131959-75-6 17.beta.-Hydroxy-3-aza-A-homo-5.alpha.-androstan-4-one p-[N,N-bis(2-chloroethyl)amino]phenylbutyrate 3-Aza-A-homoandrostan-4-one, 17-[4-[4-[bis(2-chloroethyl)amino]phenyl]-1-oxobutoxy]-, (5a,17b)- AIDS-001699 AIDS001699 Homo-aza-steroidal ester NSC622554