The boswellic acids are organic acids, consisting of a pentacyclic triterpene, a carboxyl group and at least one other functional group. Alpha-boswellic acid and beta-boswellic acid, C30H48O3 both have an additional hydroxyl group; they differ only in their triterpene structure. Acetyl-alpha-boswellic acid and acetyl-beta-boswellic acid, C32H50O4, replace the hydroxyl group with an acetyl group. Other boswellic acids include the keto-boswellic acids and their acetyl counterparts.
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