33973-56-7 Diethyl (.alpha.-butylbenzyl)phosphonate Diethyl 1-phenylpentylphosphonate NSC220103 Phosphonic acid, (.alpha.-butylbenzyl)-, diethyl ester Phosphonic acid, (1-phenylpentyl)-, diethyl ester WLN: 4YR&PO&O2&O2