Tanshinone IIB is a major active constituent of the roots of Salvia miltiorrhiza (Danshen) widely used for the research of stroke and coronary heart disease in Asian countries. Tanshinone IIB has a neuroprotective effect via inhibition of apoptosis.
References:
[1]. Xue-Qing Yu, et al. Tanshinone IIB, a primary active constituent from Salvia miltiorrhiza, exerts neuroprotective effect via inhibition of neuronal apoptosis in vitro. Phytother Res. 2008 Jun;22(6):846-50.