2-16-00-00383 (Beilstein Handbook Reference) 4538-55-0 BRN 2811322 NSC 222420 Phosphine oxide, tribenzyl- Phosphine oxide, tris(phenylmethyl)- Phosphine oxide, tris(phenylmethyl)- (9CI) Tribenzylphosphine oxide Tris(phenylmethyl)phosphine oxide