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scar

金虫 (小有名气)

[求助] 微谱求助

12.6,18.8,19.9,20.7,20.7,21.8,22.5,24.4,29.0,33.3,37.9,39.0,39.3,39.5,40.9,43.8,50.5,52.8,57.1,184.8
溶剂 氘带氯仿
多谢~
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许海杰

铁虫 (初入文坛)

【答案】应助回帖

感谢参与,应助指数 +1
这个不难,碳谱:184.8为酸上的碳,其他的组成长链脂肪酸而已,应该没那么碳 也就十六个左右,应该是十六烷酸!
学挺难念的
2楼2012-11-12 14:49:08
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scar

金虫 (小有名气)

引用回帖:
2楼: Originally posted by 许海杰 at 2012-11-12 14:49:08
这个不难,碳谱:184.8为酸上的碳,其他的组成长链脂肪酸而已,应该没那么碳 也就十六个左右,应该是十六烷酸!

我晕,我也就不说你什么了,这是个二萜!只是带了个羧基没什么官能团的二萜!推测是贝叶烷型的,只是不能够确定...
3楼2012-11-12 15:18:47
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新新手

木虫 (小有名气)

【答案】应助回帖

★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
感谢参与,应助指数 +1
scar: 金币+13, ★★★很有帮助 2012-11-12 21:25:25
1 .     (-)-trachyloban-19-oic acid
C20H30O2     相似度:100%
Planta Medica          1985          51          354-355
Further Diterpenes from Stem Bark of Xylopia aethiopica
Dalton F. Faulkner, Victor Lebby and Peter G. Waterman
Structure      13C NMR   碳谱模拟图
--------------------------------------------------------------------------------

2 .     ent-trachyloban-19-oic acid
C20H30O2     相似度:100%
Phytochemistry          1997          45          1457-1459
Ent-trachylobane diterpenoids from the liverwort Mastigophora diclados
Yuan-Wah Leong, Leslie J. Harrison
Structure      13C NMR   碳谱模拟图
--------------------------------------------------------------------------------

3 .     trachyloban-19-oic acid
    相似度:100%
Phytochemistry          1982          21          177-179
7β-Acetoxytrachyloban-18-oic acid from the stem bark of Xylopia quintasii
Choudhury M. Hasan, Terence M. Healey, Peter G. Waterman
Structure      13C NMR   碳谱模拟图
--------------------------------------------------------------------------------

4 .     12,16-cyclokauranoic acid
    相似度:100%
Phytochemistry          1983          22          875-881
Diterpene acids from Helianthus species and their microbiological conversion by Gibberella fujikuroi, mutant B1-41a
Michael H. Beale, John R. Bearder, Jake Macmillan, Akihiko Matsuo, Bernard O. Phinney
Structure      13C NMR   碳谱模拟图
--------------------------------------------------------------------------------

5 .     Trachyloban-19-oic acid
C20H30O2     相似度:100%
Archives of Pharmacal Research          2003          26          898-901
Diterpenoids from the stem barks of Croton robustus
Nattaya Ngamrojnavanich, Sorasaree Tonsiengsom, Preecha Lertpratchya, Sophon Roengsumran and Songchan Puthong, et al.
Structure      13C NMR   碳谱模拟图
--------------------------------------------------------------------------------

6 .     Methyl trachyloban-19-oate
C21H32O2     相似度:95.2%
Bioscience, Biotechnology, and Biochemistry          2005          69          1763-1766
Prolyl Endopeptidase and Thrombin Inhibitory Diterpenoids from the Bark of Xylopia aethiopica
Noungoue Tchamo DIDEROT, Ngouela SILVERE, Amsha YASIN, Seema ZAREEN, Zelefack FABIEN, Tsamo ETIENNE, M. Iqbal CHOUDHARY and ATTA-UR-RAHMAN
Structure      13C NMR   碳谱模拟图
--------------------------------------------------------------------------------

7 .     methyl trachyloban-19-oate
    相似度:90.4%
Phytochemistry          1989          28          1533-1534
3α,18-Dihydroxytrachyloban-19-oic acid from the liverwort Jungermannia exsertifolia subsp. cordifolia
Leslie J. Harrison,Yoshinori Asakawa
Structure      13C NMR   碳谱模拟图
--------------------------------------------------------------------------------

8 .     methyl ent-trachyloban 19-oate
    相似度:90%
Journal of Natural Products          1984          Vol 47          822-827
Neutral Diterpenoids of Helianthus annuus
Jan St. Pyrek
Structure      13C NMR   碳谱模拟图
--------------------------------------------------------------------------------

9 .     ent-trachyloban-19-oic acid
    相似度:90%
Journal of Chemical Ecology          2005          31          89-102
ISOLATION OF THE DITERPENOIDS, ENT-KAURAN-16α-OL AND ENT-ATISAN-16α-OL, FROM SUNFLOWERS, AS OVIPOSITION STIMULANTS FOR THE BANDED SUNFLOWER MOTH, Cochylis hospes
BRUCE D. MORRIS, STEPHEN P. FOSTER, SHARON GRUGEL and LAURENCE D. CHARLET
Structure      13C NMR   碳谱模拟图
--------------------------------------------------------------------------------

10 .     methyl trachyloban-19-oate
    相似度:85.7%
Journal of Natural Products          1983          Vol 46          745-746
Isolation and Identification of Trachyloban-19-Oic and (-)-Kaur-16-en-19-Oic Acids as Antimicrobial Agents from the Prairie Sunflower, Helianthus annuus
L. A. Mitscher, G. S. R. Rao, T. Veysoglu, S. Drake, T. Haas
4楼2012-11-12 20:35:57
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