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(5S)-5-(Hydroxymethyl)-2-pyrrolidinone17342-08-4100 % similar Pyroglutamic acid149-87-142 % similar (+)-Pyroglutamic acid4042-36-842 % similar 5-Ethenyl-2-pyrrolidinone7529-16-042 % similar L-Pyroglutamic acid98-79-342 % similar (R)-(+)-2-(BOC-Amino)-1,4-butanediol397246-14-937 % similar Methyl pyroglutamate4931-66-236 % similar Methyl 5-oxopyrrolidine-2-carboxylate54571-66-336 % similar 6-Oxopiperidine-2-carboxylic acid3770-22-735 % similar Fasoracetam110958-19-534 % similar L-Pyroglutamic acid ethyl ester7149-65-734 % similar 5-Oxo-L-proline 1,1-dimethylethyl ester35418-16-733 % similar C8-Ceramide74713-59-033 % similar Glycylserine687-38-732 % similar 3-Amino-2,6-piperidinedione2353-44-831 % similar 4-Acetamidocyclohexanone27514-08-531 % similar