methane (n.)youdaoicibaDictYouDict[methane 词源字典]
"inflammable colorless and odorless gas, marsh gas," 1867, coined from chemical suffix -ane + syllable abstracted from methyl.[methane etymology, methane origin, 英语词源]
sarin (n.)youdaoicibaDictYouDict
type of odorless nerve gas, 1945, from German, but the name is of unknown origin. Other phosphorous compounds known in Germany by the end of World War II were called Tabun, soman, Diglykol.