1,2-pyrrolidinedicarboxylic acid, 5-oxo-, 1-(phenylmethyl) ester 1-[(benzyloxy)carbonyl]-5-oxoproline 2-PYRROLIDONE,1-BENZYLOXYCARBONYL,5-CARBOXYLIC ACID L-Z-PYROGLUTAMIC ACID 80953-62-4 InChI=1/C13H13NO5/c15-11-7-6-10(12(16)17)14(11)13(18)19-8-9-4-2-1-3-5-9/h1-5,10H,6-8H2,(H,16,17