198767-48-5 2-Phenyl-3-(phenylmethyl)-4H-1,3,2-benzoxazaphosphorin-4-one 2-sulfide 2-Phenyl-3-benzyl-2,3-dihydro-4H-1,3,2-benzoxazaphosphorin-4-one 2-sulfide 4H-1,3,2-Benzoxazaphosphorin-4-one, 2,3-dihydro-2-phenyl-3-(phenylmethyl)-, 2-sulfide