Explanatory notes
… methyl methylphosphonate 2931.48 ‑ ‑ 3,9-Dimethyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5] undecane 3,9-dioxide … methyl methyl methylphosphonate. (e) 3,9-Dimethyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5] undecane 3,9-dioxide. (f) …