Citation: Neng Yu CHEN, Min Qing TIAN, Rut WU, Han Dong SUN, Chao Ming LI, Zhong Wen LIN. Two new diterpenoids from Isodon eriocalyx[J]. Chinese Chemical Letters, ;1999, 10(1): 31-32. shu

Two new diterpenoids from Isodon eriocalyx

a National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000;
b Laboratory of Phytochemistry, Kunming Institute of Botany, Academia Sinica, Kunming 650204

Received Date: 13 July 1998

Two new diterpenoids, maoecrystal U and epi-maoecrystal P were isolated from the leaves of Isodon eriocalyx. Their structures were determined as 6β-acetoxy-15β-hydroxy-3α, 20epoxy-enf-kaur-16-ene-1, 7-dione 1 and 16 (s)-methoxymethyl-6β, 7β-dihydroxy-7α, 20-epoxy-ent-kaur-2. 3-ethenylene-l. 15-dione 2 respectively, by spectroscopic methods.
- Isodon eriocalyx,
- ent-kaurenoids,
- maoecrystal U,
- epi-maoecrystal P
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