9-N(N'-Chloroethyl-N'-methyl-1,4-diaminobutyl) 2-methoxy acridine dihydrochloride AIDS-156685 AIDS156685 NSC628498 (HYDROCHLORIDE SALT) N~1~-(2-Chloroethyl)-N~4~-(2-methoxy-9-acridinyl)-N~1~-methyl-1,4-butanediamine hydrochloride