allyl-(4S,8S,9R)-10-((E)-ethylidene)-4-methoxy-11-oxo-1-azatricyclo(7.2.0.0(3,8))undec-2-ene-2-carboxylate
allyl-(4s,8s,9r)-10-((e)-ethylidene)-4-methoxy-11-oxo-1-azatricyclo(7.2.0.0(3,8))undec-2-ene-2-carboxylate