Sesquiterpene Sesquiterpene 1 某黑率务合带表均可溪期4S率毛反关 squiterpene Sesquiterpene Sesquiterpene Sesquiterpene 1% 3 302 7 6 5 4 3 2 1 Chemical Shift (ppm) 7 5 4 1 1 9 2 8 a 3 1 4 1 2 a12 b 8 b 1 5 1 3 O A c 3 2 4 1 O Me13 O 12 11 O 10 9 O Me15 8 7 O 6 5 Me14 H O CH3 O H3C H H H H H H Sesquiterpene 303 6.0 5.5 5.0 4.5 Chemical Shift (ppm) 4 3 2 1 O O CH2 13 12 5 11 10 H2C 15 9 HO 8 7 6 CH3 14 HO H H H 13a 7 8 13b 15a15b 4 Sesquiterpene NOE和偶合常数均可说明H-3, H-4, H-5都是反式关 系。 304 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0 1.9 1.8 1.7 1.6 Chemical Shift (ppm) 4 3 2 1 O O CH2 13 12 5 11 10 H2C 15 9 HO 8 7 6 CH3 14 HO H H H 11a 3 11b 5 12a 12b 14 Sesquiterpene 305 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 Chemical Shift (ppm) Chloroform-d 3 2 4 1 O 12 11 5 9 10 6 7 8 H3C 13 O H2C 15 CH3 14 H H H H H O 15a 15b 4 Sesquiterpene 306 4.10 4.05 3 2 4 1 O 12 11 5 9 10 6 7 8 H3C 13 O H2C 15 CH3 14 H H H H H O 3.0 2.5 2.0 1.5 Chemical Shift (ppm) 4 9 2 11a 3a 6 5 11b12a 12b 14 13 Sesquiterpene 307 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 Chemical Shift (ppm) 14 3.10 3.05 3.00 15 7 4 2 11a 3 9 5 2.1 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 Chemical Shift (ppm) 8a 11b 12a 12b 8b 8a 11b 8b 12a 12b H 4 O O H 12b H 12a H 3 H 5 H 9 H CH2 11a H 11b 6 CH2 OH H 7 H 8a H 8b H3C H Sesquiterpene