3,3-Dimethyl-2-butyl methylphosphonofluoridate 3,3-Dimethylbutyl methylphosphonofluoridate 4-04-00-03508 (Beilstein Handbook Reference) 660-21-9 BRN 1761998 Methyl-fluoro-phosphoryl-carbocholine Phosphonofluoridic acid, methyl-, 3,3-dimethylbutyl ester