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<url><loc>https://stock.noler.com/us/stock/vtvt/operating-lease-payments-due-2</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/operating-lease-payments-due-after-year-five</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/operating-lease-payments-due-current</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/operating-lease-payments-due-in-two-years</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/operating-lease-payments-due-next-twelve-months</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/operating-lease-payments-due-year-five</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/operating-lease-payments-due-year-four</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/operating-lease-payments-due-year-three</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/operating-lease-payments-due-year-two</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/operating-lease-weighted-average-discount-rate-percent</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/operating-margin</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/options-activity</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/other-accrued-liabilities-current</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/other-current-assets</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/other-current-liabilities</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/other-noncurrent-assets</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/other-noncurrent-liabilities</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/other-nonoperating-income-expense</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/other-prepaid-expense-current</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/other-sundry-liabilities-current</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/outstanding-bonds</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/paid-in-capital-stock-compensation</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/paid-in-capital-warrant-issued</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/patents-active</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/payments-for-restructuring</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/payments-of-debt-issuance-costs</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/pb-ratio</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/pe-ratio</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/pre-tax-margin</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/preferred-shares-facts</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/preferred-stock-par-or-stated-value-per-share</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/preferred-stock-shares-authorized</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/preferred-stock-shares-outstanding</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/prepaid-expense-and-other-assets-current</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/prepaid-expense-current</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/prepaid-insurance</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/prepaid-taxes</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/pretax-income</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/previous-etf-holding-it</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/price-fcf-ratio</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-collection-of-notes-receivable</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-issuance-initial-public-offering</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-issuance-of-debt</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-issuance-of-preferred-stock-preference-stock-and-warrants</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-notes-payable</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-related-party-debt</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-repayment-of-loans-to-purchase-common-stock</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-repayments-of-debt</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-repayments-of-notes-payable</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-sale-of-equity-securities-fv-ni</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-sales-of-assets-investing-activities</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-stock-issued</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/proceeds-from-stock-options-exercised</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/profit-breakdown</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/profit-loss</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/property-plant-and-equipment-gross</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/property-plant-equipment</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/ps-ratio</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/public-float</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/quick-ratio</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/reclassifications-of-temporary-to-permanent-equity</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/redeemable-noncontrolling-interest-equity-carrying-amount</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/redeemable-noncontrolling-interest-equity-fair-value</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/repayments-of-notes-payable</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/research-and-development</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/restricted-cash-and-cash-equivalents</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/restricted-cash-and-cash-equivalents-at-carrying-value</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/restricted-cash-and-cash-equivalents-noncurrent</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/restricted-cash-current</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/restructuring-and-related-cost-number-of-positions-eliminated-inception-to-date-percent</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/restructuring-costs</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/retained-earnings</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/return-on-tangible-equity</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/revenue</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/revenue-breakdown</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/right-of-use-asset-obtained-in-exchange-for-operating-lease-liability</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/roa</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/roe</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/roi</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/sales-revenue-net</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/scorecard</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/sec-comment-letters-upload</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/sec-enforcement-actions</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/sec-filings-10-q</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/sec-filings-25-nse</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/sec-filings-8-k</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/sec-filings-px14a6g</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/sec-filings-s-4</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/secondary-offerings</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/severance-costs</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/shareholders-equity</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/shares-authorized</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/shares-issued</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/shares-outstanding</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/short-sale-volume</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/short-term-borrowings</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/significant-change-in-utb-is-reasonably-possible-amount-of-unrecorded-benefit</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-fair-value-assumptions-expected-dividend-rate</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-fair-value-assumptions-expected-volatility-rate</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-fair-value-assumptions-expected-volatility-rate-maximum</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-fair-value-assumptions-expected-volatility-rate-minimum</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-fair-value-assumptions-risk-free-interest-rate</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-fair-value-assumptions-risk-free-interest-rate-maximum</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-fair-value-assumptions-risk-free-interest-rate-minimum</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-options-exercises-in-period-average-exercise-price</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-options-expirations-in-period-average-exercise-price</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-options-forfeitures-in-period-average-exercise-price</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-options-grants-in-period-average-exercise-price</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-rsu-aggregate-intrinsic-value-outstanding</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-rsu-forfeited-in-period</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-rsu-forfeitures-grant-date-fair-value</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-rsu-grants-in-period</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-rsu-grants-in-period-grant-date-fair-value</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-rsu-nonvested-grant-date-fair-value</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-award-rsu-nonvested-number</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-based-compensation</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-compensation-tax-benefit-from-compensation-expense</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-compensation-unrecognized-cost-stock-options</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-issued-new-shares-sold</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-issued-shares-issued-for-options-exercised</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-issued-shares-issued-value-conversion-of-convertible-securities</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-issued-shares-issued-value-stock-options-exercised</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-exercisable-average-exercise-price</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-exercisable-intrinsic-value</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-exercisable-number</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-exercises-in-period-total-intrinsic-value</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-expirations-in-period</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-forfeitures-in-period</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-grants-in-period-grant-date-fair-value</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-grants-in-period-gross</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-outstanding-average-exercise-price</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-outstanding-intrinsic-value</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-outstanding-number</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-vested-and-expected-to-vest-exercisable-aggregate-intrinsic-value</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-vested-and-expected-to-vest-exercisable-average-exercise-price</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-vested-and-expected-to-vest-exercisable-number</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-vested-and-expected-to-vest-outstanding-aggregate-intrinsic-value</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-options-vested-in-period-fair-value</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stock-splits</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/stockholders-equity-including-portion-attributable-to-noncontrolling-interest</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/subsidiaries</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-credit-carryforward-amount</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-rate-reconciliation-at-federal-statutory-income-tax-rate</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-rate-reconciliation-change-in-deferred-tax-assets-valuation-allowance</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-rate-reconciliation-deductions-other</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-rate-reconciliation-tax-credits</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-reconciliation-change-in-deferred-tax-assets-valuation-allowance</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-reconciliation-change-in-enacted-tax-rate</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-reconciliation-deductions-other</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-reconciliation-other-adjustments</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-reconciliation-other-reconciling-items</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-reconciliation-state-and-local-income-taxes</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-reconciliation-tax-credits</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-reconciliation-tax-credits-research</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/tax-withholding-on-stock-awards</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/temporary-equity-carrying-amount-including-portion-attributable-to-noncontrolling-interests</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/temporary-equity-issue-period-increase-or-decrease</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/total-assets</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/total-contract-liability</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/total-liabilities</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/total-liabilities-and-equity</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/total-long-term-debt</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/total-shareholder-rtn-amt</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/ttl-fee-amt</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/ttl-offering-amt</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/ttl-offset-amt</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/unrealized-gain-loss-on-investments</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/unrecognized-tax-benefits</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/valuation-allowance-deferred-tax-asset-change-in-amount</loc></url>
<url><loc>https://stock.noler.com/us/stock/vtvt/warrants-and-rights-outstanding</loc></url>
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