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(3-CHLOROBENZYL)PHOSPHONIC ACID DIETHYL ESTER DIETHYL 4-BROMOBENZYL PHOSPHONATE DIMETHYL(4-METHOXYBENZYL)PHOSPHONATE (3-METHOXYBENZYL)PHOSPHONIC ACID DIETHYL ESTER DIMETHYL(4-BROMOBENZYL)PHOSPHONATE DIETHYL(4-NITROBENZYL)PHOSPHONATE Diethyl 2-broMobenzylphosphonate DIETHYL 4-CHLOROBENZYLPHOSPHONATE diethyl 2-nitrobenzylphosphonate