noun
isonicotinic acid
A pyridinecarboxylic acid isomer; technical term used in organic chemistry and biochemistry.
イソニコチン酸はピリジン環を持つカルボン酸の一種である。
Isonicotinic acid is a type of carboxylic acid with a pyridine ring.
Nicotinic acid (niacin), a different isomer with the carboxyl group at the 3-position; isonicotinic acid has it at the 4-position.
From iso- (isomer) + nicotinic acid. The name reflects its structural relationship to nicotinic acid.