(4,5-Dihydro-3-phenyl-5-isoxazolyl)phosphonic acid 125674-53-5 3-Phenyl-2-isoxazoline-5-phosphonic acid 58144-61-9 BRN 0985524 Hab 439 Phosphonic acid, (4,5-dihydro-3-phenyl-5-isoxazolyl)-