<br /> POWER OF ATTORNEY<br /> <br /> KNOW ALL PERSONS BY THESE PRESENTS that<br /> VWR PARTNERS, L.P. (the "Company") does hereby make,<br /> constitute and appoint each of Jamison Yardley, and<br /> Jennifer Lee, acting individually, its true and lawful<br /> attorney, to execute and deliver in its name and on its<br /> behalf whether the Company is acting individually or as<br /> representative of others, any and all filings required<br /> to be made by the Company under the Securities Exchange<br /> Act of 1934, (as amended, the "Act"), with respect to<br /> securities which may be deemed to be beneficially owned<br /> by the Company under the Act, giving and granting unto<br /> each said attorney-in-fact power and authority to act in<br /> the premises as fully and to all intents and purposes as<br /> the Company might or could do if personally present by<br /> one of its authorized signatories, hereby ratifying and<br /> confirming all that said attorney-in-fact shall lawfully<br /> do or cause to be done by virtue hereof.<br /> <br /> THIS POWER OF ATTORNEY shall remain in full force and<br /> effect until the earlier of (i)<br /> May 20, 2022 and (ii) such time that it is revoked in<br /> writing by the undersigned; provided that in the event<br /> the attorney-in-fact ceases to be an employee of the<br /> Company or its affiliates or ceases to perform the function<br /> in connection with which he/she was appointed<br /> attorney-in-fact prior to such time, this Power<br /> of Attorney shall cease to have effect in relation<br /> to such attorney-in-fact upon such cessation but<br /> shall continue in full force and effect in relation<br /> to any remaining attorneys-in-fact. The Company has<br /> the unrestricted right unilaterally to revoke this<br /> Power of Attorney.</p> <p>This Power of Attorney shall be governed by, and<br /> construed in accordance with, the laws of the State<br /> of New York, without regard to rules of conflicts of law.<br /> <br /> IN WITNESS WHEREOF, the undersigned has duly subscribed<br /> these presents as of May 21, 2019.<br /> <br /> VWR PARTNERS, L.P.</p> <p>By: Bridge Street Opportunity Advisors, L.L.C., its<br /> General Partner</p> <p><br /> By: /s/ William Y. Eng<br /> Name: William Y. Eng<br /> Title: Vice President<br />