2-(3-Mesityl-5-(4-methoxyphenyl)-4-isoxazolyl)-1,4,5,6-tetrahydropyrimidine 3-(2,4,6-Trimethylphenyl)-4-(2-tetrahydroprimidinyl)-5- (4-methoxyphenyl)-isooxazole 4-(3-Mesityl-4-(1,4,5,6-tetrahydro-2-pyrimidinyl)-5-isoxazolyl)phenyl methyl ether AIDS-138368 AIDS138368 NSC645051