15,19-Epoxy-3H-pyrido2,1-c1,4oxaazacyclotricosine-1,7,20,21(4H,23H)-tetrone, 8-ethyl-5,6,8,11,12,13,14,15,16,17,18,19,24,25,26,26a-hexadecahydro-5,8,19-trihydroxy-3-2-(4-hydroxy-3-methoxycyclohexyl)-1-methylethenyl-14,16-dimethoxy-4,10,12,18-tetramethyl-,