[Chemical studies of Salvia miltiorrhiza f. alba]

Fourteen constituents were isolated from the roots of Salvia miltiorrhiza f. alba. Two of them were new compounds and were named 1,2,15,16-tetrahydrotanshiquinone (I) and tanshinaldehyde (II). The others were identified as Ro-090680 (III), dihydroisotanshone I (IV), danshexinkun B (V), miltirone (VI), nortanshinone (VII), hydroxytanshinone II-A (VIII), tanshinone I (IX), dihydrotanshinone I (X), tanshinone II-A (XI), cryptotanshinone (XII), methylenetanshiquinone (XIII), methyltanshinonate (XIV), I and III showed inhibitory activity against P388 Leukemia cell in vitro. III was reported to be a potent inhibitor of rabbit platelet aggregation induced by collagen.