quilostigmine

Etymology tree
Ancient Greek ῐ̓́σος (ĭ́sos)lbor.
English iso-
English quinine
English -oline
English quinoline
English isoquinoline
Ancient Greek -ο- (-o-)der.
Latin -o-bor.
English -o-
Ancient Greek φῦσᾰ (phûsă)
Translingual stigma
Translingual Physostigma
Proto-Indo-European *-nós
Proto-Indo-European *-iHnos
Proto-Italic *-īnos
Latin -īnusder.
Old French -inbor.
Middle English -in
English -ine
English physostigmine
English -stigmine
English quilostigmine
From (iso)qui(no)l(ine) + -o- + -stigmine (“acetylcholinesterase inhibitor”).