Two new fatty diterpenoids from Salvia miltiorrhiza

Two new fatty abietane diterpenoids, oleoyl neocryptotanshinone (1) and oleoyl danshenxinkun A (2), were isolated as minor components from the roots of Salvia miltiorrhiza. Their structures were established on the basis of spectral evidence. In preliminary tests, they selectively inhibited rabbit platelet aggregation induced by arachidonic acid.