EPNオキソンEPN-オキソンフェニルホスホン酸O-エチルO-(p-ニトロフェニル)フェニルホスホン酸エチル4-ニトロフェニルEPNオキソン標準品EPN Oxon StandardEPN Oxon@100 μg/mL in Acetoneo-ethylo-4-nitrophenylphenylphosphonateEPN oxon, in acetone, 100 μg/mL in acetonephenyl-phosphonicaciethyl4-nitrophenylesterPHOSPHONICACID,PHENYL-,ETHYL4-NITROPHENYLESTER