4-(Ethylanilino)-1,6,7,8,9,9a-hexahydro-2H-pyrido[1,2-a]pyrimidin-2-one AIDS-133541 AIDS133541 NSC629498 {2H-Pyrido[1,2-a]pyrimidin-2-one,} 4-ethylphenylamino-1,6,8,9, 9a-hexahydro-