the alkyl that comes from methane; often used before another noun in the name of chemical substances

The four main parabens used as preservatives are methyl, ethyl, propyl and butylparabens. 作为防腐剂的对羟基苯甲酸酯主要有四种: 甲基、乙基、丙基和丁基对羟基苯甲酸酯。

methyl bromide 甲基溴

methyl alcohol 甲醇