CO[C@H]1C[C@H](C)CC2=C(O)C(=O)C=C(NC(=O)/C(C)=C/CC[C@H](OC)[C@@H](OC(N)=O)/C(C)=C/[C@H](C)[C@H]1O)C2=O	4,5-dihydro-17-O-demethylgeldanamycin