Figure 1. Chemical structure of 2H-chromen-2-one (coumarin)

From

Coumarin, a Lead Compound of Warfarin, Inhibits Melanogenesis via Blocking Adenylyl Cyclase

Dong-Chan Kim, Seong-Hwan Rho, Dongjin Kim, Sung In Kim, Chul-Soo Jang, Jae Ki Ryu, Byung Weon Kim, Chang Oh Kweon, Hyun-kyung Kim, Suk Jun Lee

American Journal of Biomedical Research. 2013, 1(3), 43-47 doi:10.12691/ajbr-1-3-1