5,6-Diaza-8b-azoniaacenaphthylene, 1,2,2a,3,4,5,6,8a-octahydro-7-methyl-4-[(6R)-6-(phenylmethoxy)heptyl]-8-[(2-propenyloxy)carbonyl]-, (2aS,4R,8aS)- AIDS-221581 AIDS221581