An older spelling variant of acetphenetidin; a compound formed by acetylating phenetidine.
From 'acet-' (acetyl) + 'phenetid' (from 'phenetidine', an ethoxy-aniline). This older nomenclature predates the standardized '-in' ending that became standard in chemical nomenclature.
Acetphenetid is the ancestor of acetaminophen (Tylenol)—it's literally the same compound called by an old name, showing how pharmaceutical history is written in the changing names of molecules.
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