p. 635 - 650
(2007/10/02)benzyl 9-O-methylclavulanate
Benzyl 3-hydroxypyrrole-3-carboxylate
Carbonic acid benzyl ester 3-(3-hydroxy-1H-pyrrol-2-yl)-3-oxo-propyl ester
(Z)-2-(2-Acetoxy-4-oxo-azetidin-1-yl)-3,5-dihydroxy-pent-2-enoic acid benzyl ester
benzyl 9-O-acetylclavulanate