2,3-Dihydroxypropyl methacrylate polymer with methyl methacrylate 2-Propenoic acid, 2-methyl-, 2,3-dihydroxypropyl ester, polymer with methyl 2-methyl-2-propenoate 50450-03-8 CS 151 Crofilcon A Crofilcon A [USAN]