0
C20H32O2
Arachidonic acid.
An arachidoyl is a univalent radical formally derived from arachidic acid by removal of the hydroxyl group.
An arachidonoyl is a univalent radical formally derived from arachidic acid by removal of the hydroxyl group.
Peanut oil doesn't contain arachidonic acid (20:4) but does contain about 1.5% arachidic acid (20:0).
Arachidonic acid and arachidic acid are two but there are many others.
Paraffin Wax of which C21H44 is a major component is another.