16486-28-5 2H-1,3,5-Thiadiazine-2-thione, tetrahydro-3,5-dimethyl-4,6-diphenyl- NSC 157369 Nip 200 Nip-200 Tetrahydro-3,5-dimethyl-4,6-diphenyl-2H-1,3,5-thiadiazine-2-thione