(2S-(2R,5Z,9R,10R,16R))-3,4,7,8-Tetradehydro-2,9-dihydro-9-hydroxy-1H-10,2,10-(epoxymetheno)-1-benzazacyclododecine-1-carboxylic acid (2-nitrophenyl)methyl ester 150652-92-9