4'R,5'R,7'S,1''R-4-(5'-(1'',2''-dihydroxyethyl)-1'-formyl-7'-(hydroxymethyl)-4',5',7',8'-tetrahydro-2H-4',7'-epoxyoxepino(4,5-c)pyrrol-2-yl)butanoic acid
4'r,5'r,7's,1''r-4-(5'-(1'',2''-dihydroxyethyl)-1'-formyl-7'-(hydroxymethyl)-4',5',7',8'-tetrahydro-2h-4',7'-epoxyoxepino(4,5-c)pyrrol-2-yl)butanoic acid