| 摘要 |
Title compds. (I ; R = H, hydroxyl, amino, nitrile, X = H) were prepd. by enzymatic cleavage of compd. II (R2 = amino, hydroxyl, 2-thienyl, R3 = H, amino, hydroxyl, C1-C3 alkyl) with penicllin-nacylase which was covalent-bonded with copolymer of 0.1-50% unsaturated dicarboxylic acid anhydride and di or polyacrylate 99.5-50%.
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