(1S,9R,11S,19R)-1,8,11,18-Tetramethyl-5,9,10,11,15,18,19,20-octahydro-4H,7H-1,19:9,11-diethanodibenzo[c,k][1,9]dioxacyclohexadecine-4,7,14,17(1H,8H)-tetrone 57901-39-0 AIDS-013269 AIDS013269 NSC361242