β-Sitostenone is a sterols that can be isolated from Cochlospermum vitifolium.β-Sitostenone inhibits tyrosinase activity, and has anti-melanogenic and anti-tumor activities[1][2][3].
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[2]. Chu CW, et al. Biofunctional Constituents from Michelia compressa var. lanyuensis with Anti-Melanogenic Properties. Molecules. 2015 Jul 3;20(7):12166-74.
[3]. Fan SQ, et al. Sarocladione, a unique 5,10:8,9-diseco-steroid from the deep-sea-derived fungus Sarocladium kiliense. Org Biomol Chem. 2019 Jun 18;17(24):5925-5928.