2-(1-Pyrrolidinyl)ethyl 2-(1,2,3,4-tetrahydro-9H-carbazol-9-yl)ethyl ether 9-(2-(2-(1-Pyrrolidinyl)ethoxy)ethyl)-2,3,4,9-tetrahydro-1H-carbazole AIDS-145469 AIDS145469 NSC670273