Carbobenzoxyoxoproline

N-CARBOBENZOXY-4-OXO-L-PROLINE

N-carbobenzyloxy-4-keto-L-proline

1-(Benzyloxycarbonyl)-4-keto-(S)-proline

(S)-1-((Benzyloxy)carbonyl)-4-oxopyrrolidine-2-carboxylic acid