198767-49-6 2-Phenyl-3-methylamino-2,3-dihydro-4H-1,3,2-benzoxazaphosphorin-4-one 2-sulfide 3-(Methylamino)-2-phenyl-2,3-dihydro-4H-1,3,2-benzoxazaphosphorin-4-one 2-sulfide 4H-1,3,2-Benzoxazaphosphorin-4-one, 2,3-dihydro-3-(methylamino)-2-phenyl-, 2-sulfide