32674-72-9 4-(p-Methoxy-p-methylphosphinyl)-3-oxo-2,2,4-trimethylvaleric acid methyl ester Methyl 4-[(methoxy)methylphosphinyl]-2,2,4-trimethyl-3-oxovalerate NSC131283 Pentanoic acid, 4-(methoxymethylphosphinyl)-2,2,4-trimethyl-3-oxo-, methyl ester Valeric acid, 4-(p-methoxy-p-methylphosphinyl)-3-oxo-2,2,4-trimethyl-, methyl ester