Ac-Phe-OEt enzyme substrate product blog Tags: Enzyme Substrate; Ac-Phe-OEt; Ac-Phe-OEt enzyme substrate; Posted by mybiosource_staff on . The Ac-Phe-OEt n/a (Catalog #MBS406210) is a Substrate and is intended for research purposes only. The product is available for immediate purchase.To buy or view more detailed product information and pricing, please click on the technical datasheet page below:Ac-Phe-OEtAcetyl-L-Phenylalanine Ethyl Ester (M.W. 235.28) C H NO [2361-96-8] Grade AA.Cas Number: 2361-96-8.