Sinapic acid is an hydroxycinnamic acid derivative that occurs naturally in Brassicaceae species. Sinapic acid can be used: • As a potent peroxynitrite (ONOO−) oxidant scavenger for the protection of the cellular constituents against peroxynitrite cytotoxic species. • In the synthesis of antioxidant hydroxycinnamic acid xylan esters via esterification reaction. • In the synthesis of pseudo-cinnamic derivatives effective against mycobacterium tuberculosis Sinapic acid is an hydroxycinnamic acid derivative that occurs naturally in Brassicaceae species. Sinapic acid can be used: • As a potent peroxynitrite (ONOO−) oxidant scavenger for the protection of the cellular constituents against peroxynitrite cytotoxic species. • In the synthesis of antioxidant hydroxycinnamic acid xylan esters via esterification reaction. • In the synthesis of pseudo-cinnamic derivatives effective against mycobacterium tuberculosis