Your comment remember me a joke in Spanish. I will try to translate it into English:
In a chemist's
Customer: Excuse-me could you give me a box of acetylsalicylic acid pills, please?
Chemist: Do you mean a box of aspirins?
Customer: Yes, exactly. Sorry I can never remember that difficult word.
that it is the extract from the willow tree. Nowadays synthesized and called acetylsalicylic acid (Aspirin). Comes from the latin word salix = willow tree