A New 6,7-Seco-Ent-Kaurane Diterpenoid from Isodon eriocalyx Var. laxiflora

Chinese Chemical Letters

Volumn 12, Issue 10, 2001, Pages 897-898

  Niu, Xue Mei ^a   Li, Sheng Hong ^a   Mei, Shuang Xi ^a   Lin, Zhong Wen ^a   Sun, Han Dong ^a  

^a KUNMING INSTITUTE OF BOTANY   (China)

Author keywords

6,7 seco ent kaurane diterpenoid; Isodon eriocalyx var. laxiflora; Laxiflorin E

Indexed keywords

EID: 0035599860     PISSN: 10018417     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (3)

1. H. D. Sun, Z. W. Lin, F. D. Niu, P. Q, Shen, L. T. Pan, L. Z, Lin and G. A. Coedell, Phytochemistry, 1995, 38, 1451.
2. J. Wang, Z. W. Lin, H. D. Sun, Chinese Chemical Letters, 1997, 8, 421.
3. 5N, 500 MHz, δ in ppm, J in Hz): 5.90 (d, 1H, J=10.2 Hz, H-2), 6.48 (d, 1H, J=10.2 Hz, H-3), 2.25 (brs, 1H, H-5), 4.29 (brs, 2H, H-6), 2.91 (dd, 1H, J=4.3, 3.0 Hz, H-9), 1.80 (m, 1H, H-11b), 1.64 (m, 1H, H-11b), 2.02 (m, 1H, H-12a), 1.29 (m, 1H, H-12b), 1.99 (brs, 1H, H-13), 2.81 (m, 2H, H-14), 2.08 (brd, 1H, J=7.6 Hz, H-16), 1.06 (d, 3H, J=7.6 Hz, H-17), 1.17 (s, 3H, H-18), 1.22 (s, 3H, H-19), 5.27 (d, 1H, J=11.1 Hz, H-20a), 4.82 (d, 1H, J=11.1 Hz, H-20b).