Salvidorol, a nor-abietane diterpene with a rare carbon skeleton and two abietane diterpene derivatives from Salvia dorrii

Salvidorol (1), a irregular abietane-type diterpene and two epimeric diterpenes were isolated from the aerial parts of Salvia dorrii. The structures were established by high-field NMR techniques (1H-1H COSY, DEPT, HMQC, HMBC, NOESY, HRMS) and X-ray analysis.