Xanthoxyline has antispasmodic, fungistatic, antinociceptive and antioedematogenic activities. Xanthoxylin has inhibitory effect on blood platelet aggregation; it induces melanogenesis mainly via cAMP-mediated PKA activation, other signaling pathways may also play a role in xanthoxylin-induced melanogenesis. Xanthoxylin is a carboxylic ester. It is functionally related to a phloroglucinol.