| 1 | 1449-91-8 | Ethylidynetris(methyleneoxy)phosphine | Ethylidynetris(methyleneoxy)phosphine | C5H9O3P
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| 2 | 183719-83-7 | | Phosphonic acid, ethenyl-, mono-2-propenyl ester | C5H9O3P
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| 3 | 18620-05-8 | | 3,5,8-Trioxa-1-phosphabicyclo[2.2.2]octane, 4-methyl- | C5H9O3P
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| 4 | 18356-17-7 | 丙二烯磷酸甲酯 | Phosphonic acid, P-1,2-propadien-1-yl-, dimethyl ester | C5H9O3P
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| 5 | 425620-68-4 | 1H-Phosphol-3-ol, 2,3-dihydro-1-methoxy-, 1-oxide (9CI) | 1H-Phosphol-3-ol, 2,3-dihydro-1-methoxy-, 1-oxide (9CI) | C5H9O3P
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| 6 | 20335-83-5 | 1,2-氧磷醇,2,3-二氢-2-甲氧基-5-甲基,2-氧化物 | 1,2-Oxaphosphole, 2,3-dihydro-2-methoxy-5-methyl-, 2-oxide | C5H9O3P
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| 7 | | 2-HYDROXY-5,5-DIMETHYL-2,5-DIHYDRO-1,2LAMBDA5-OXAPHOSPHOL-2-ONE | 2-HYDROXY-5,5-DIMETHYL-2,5-DIHYDRO-1,2LAMBDA5-OXAPHOSPHOL-2-ONE | C5H9O3P
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