[(4as,4br,8s,10ar,10bs,12as)-10a,12a-dimethyl-2-oxo-3,4,4a,4b,5,7,8,9,10,10b,11,12-dodecahydro-1h-naphtho[2,1-f]quinolin-8-yl] 2-[4-[bis(2-chloroethyl)amino]phenyl]acetate