5,?8,?11-?Trioxa-?2,?14-?diazaheptadecanoic acid, 17-?(2,?5-?dihydro-?2,?5-?dioxo-?1H-?pyrrol-?1-?yl)?-?15-?oxo-?, (1R,?8S)?-?bicyclo[6.1.0]?non-?4-?yn-?9-?ylmethyl ester, rel- [ 2141976-33-0 ]