Where does “allylmercaptomethylpenicillin” come from?

allylmercaptomethylpenicillin (English) comes from English penicillin, from Translingual Penicillium, from Latin pēnicillum, from Latin -illus, from Latin -lus, from Proto-Italic -elos, from Proto-Indo-European -e-lós, from Proto-Indo-European -lós — Forms agent nouns from verbal roots.

Ancestry of “allylmercaptomethylpenicillin”, step by step

allylmercaptomethylpenicillin traces back through 3 separate lines of ancestry.

via English penicillin

StepLanguageWordMeaning
1EnglishpenicillinAny of a group of narrow-spectrum antibiotics...
2TranslingualPenicilliumgenus
3LatinpēnicillumA painter's brush
4Latin-illusUsed to form adjectives from nouns
5Latin-lusAlternative form of -ulus; diminutive suffix
6Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
7Proto-Indo-European-e-lós
8Proto-Indo-European-lósForms agent nouns from verbal roots

via English allyl

StepLanguageWordMeaning
1EnglishallylThe univalent radical, CH=CH-CH-, existing...
2English-ylA univalent radical or functional group formed...
3Frenchméthylènemethylene
4Ancient Greekμέθυwine
5Proto-Hellenicmétʰuintoxicating drink; mead
6Proto-Indo-Europeanmédʰuhoney; honey wine, mead

via English methyl

StepLanguageWordMeaning
1EnglishmethylThe univalent hydrocarbon radical, CH-, formally...
2GermanMethylmethyl
3German-ylyl
4Ancient Greekῡ̔́ληforest; matter; wood; matter
Every word from Proto-Indo-European -lós