Seven known abietane diterpenoids and 11-O- and 12-O-acetylcarnosic acids were isolated from a methanol extract of Perovskia abrotanoides (Labiatae). Structure and cytotoxic activity relationships (SAR) of the natural and semisynthetic analogues of the presently isolated abietane diterpenoids were
Isetexane diterpene analogues were semisynthesized from demethylsalvicanol isolated from Perovskia abrotanoides (Labiatae). The structure and cytotoxic activity relationships (SAR) of the natural parent diterpene, demethylsalvicanol, and its semisynthetic analogues were studied by using P388 murine
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