Excisanin H, a novel cytotoxic 14,20-epoxy-ent-kaurene diterpenoid, and three new ent-kaurene diterpenoids from Rabdosia excisa.
A novel 14,20-epoxy-ent-kaurene diterpenoid, excisanin H (1), and three new ent-kaurene diterpenoids, 2-4, were isolated from aerial parts of Rabdosia excisa along with eight known ent-kaurene diterpenoids, 5-12. The structural elucidations were made using spectral (HREIMS, IR, (1)H, (13)C, and 2D NMR) methods. The absolute configuration of 1 was determined by demonstrating that oxidation of kamebakaurin (8) produced excisanin H (1). These ent-kaurene diterpenoids all showed significant cytotoxic activity against P388 murine leukemia cells.
Gui
Ming-Yu
MY
School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan.
Aoyagi
Yutaka
Y
Jin
Yong-Ri
YR
Li
Xu-Wen
XW
Hasuda
Tomoyo
T
Takeya
Koichi
K
D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D045786:Diterpenes, Kaurane / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D019686:Lamiaceae / Q000737:chemistry*; D007941:Leukemia P388; D015394:Molecular Structure; D010084:Oxidation-Reduction; D010946:Plants, Medicinal / Q000737:chemistry*
D000972:Antineoplastic Agents, Phytogenic; D045786:Diterpenes, Kaurane; D004365:Drugs, Chinese Herbal; C484471:excisanin H