InChI=1S/C19H20O3/c1-10-9-22-18-14(10)16(20)12-6-7-13-11(15(12)17(18)21)5-4-8-19(13,2)3/h6-7,10H,4-5,8-9H2,1-3H3

Isocryptotanshinone is a natural bioactive product that is isolated from the roots of the widely used medical herb Salvia miltiorrhiza, inhibits MCF-7 cell proliferation by inducing apoptosis and activating MAPK signaling pathways.[1]
Isocryptotanshinone is a STAT3 inhibitor, induces apoptosis and pro-death autophagy in A549 lung cancer cells.[2]

English website: Isocryptotanshinone
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[1] Zhang X, Luo W, Zhao W, et al. J Breast Cancer, 2015, 18(2):112-8.
[2] Guo S, Luo W, Liu L, et al. J Drug Target, 2016, 24:1-28.
[3] Weng Q, Yu X, Feng F, et al. Asia-Pacific Traditional Medicine, 2011, 07(8):5-7.