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TRIETHYL 2-PHOSPHONOPROPIONATE BIS(2,2,2-TRIFLUOROETHYL) (METHOXYCARBONYLMETHYL)PHOSPHONATE TRIETHYL 2-PHOSPHONOPENTANOATE Triethyl 2-fluoro-2-phosphonoacetate tert-Butyl diethylphosphonoacetate Methyl diethylphosphonoacetate TRIETHYL ALPHA-PROPARGYLPHOSPHONOACETATE TRIETHYL PHOSPHONOACETATE-1-13C ALLYL DIETHYLPHOSPHONOACETATE 2-ETHOXY-TRIETHYLPHOSPHONOACETATE