N-[10-(2-aziridin-1-ylethoxy)-4-[(benzyloxy)imino]-1,2-bis(4-hydroxybutyl)-6a-(prop-2-en-1-yloxy)-1,2,4,5,6,6a,11b,11c-octahydrobenzo[kl]xanthen-6-yl]-N-methyl-3-(4-nitrophenyl)prop-2-enamide