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Studies on Fatty Acid Composition in the Oil of Momordica cochinchinensis

Studies on Fatty Acid Composition in the Oil of Momordica cochinchinensis



全 文 :( 3H, s, 4′-OCH3 ) , 6. 10( 2H, s, -O-CH2-O-)。 1 3 CN-
M R( 125 MHz, CDCl3 )δ: 154. 9( C-1) , 140. 3( C-3) ,
121. 5( C-4) , 133. 0( C-4a ) , 102. 2( C-5) , 149. 2( C-
6) , 148. 4( C-7) , 102. 7 ( C-8) , 123. 9( C-8a ) , 130. 4
( C-1′) , 133. 1 ( C-2′) , 113. 7( C-3′) , 163. 5( C-4′) ,
113. 7( C-5′) , 133. 1( C-6′) , 55. 5( 4′, -OCH3 ) , 101. 8
( -O-CH2 -O-) , 186. 0( C= O)。 碳谱数据与文献 [7 ]记
载的 ( 6, 7-亚甲二甲氧基异喹啉基 ) -( 4′-甲氧基苯
基 )甲酮 [ ( 6, 7-methy lenediox yisoquinolinyl ) -( 4′-
methoxyphenyl) methanone ]基本一致。
化合物Ⅳ:浅黄色片晶 , mp 194℃~ 196℃。与
对照品 vanil lic acid共薄层 , Rf值一致 ; IR谱与对
照品 vanillic acid的标准红外光谱基本一致 ,故鉴定
为 vanillic acid( 4-羟基 -3-甲氧基苯甲酸 )。
致谢: 北京大学药学院天然药物及仿生药物国
家重点实验室核磁室代测 NMR光谱 ;中科院化学
所代测 EIM S和 HR-SIM S谱 ;中国医科院药物所
国家药物及代谢产物分析研究中心代测 X衍射分
析。
参 考 文 献
1 中国科学院植物研究所 .中国高等植物图鉴 (第一册 ) . 北京:科
学出版社 , 1994: 822
2 张凤仙 ,刘梅芳 ,李毓敬 ,等 . 植物学报 , 1988, 30: 183
3  Smolnycki W D, Moniot J L, Hindenlang D M, et al . Tet rahe-
dron Let ters, 1978, ( 47): 4617
4  Nordin H L, M ahmud Z, Toia R F, et al . JNat Prod, 1991, 54:
612
5  Fernandes J B, Ribeiro M N S, Got t li eb O R, et al . Ph ytochem,
1980, 19: 1523
6  Si lv a M S Da, Filh o J M B, Yosh ida M , et al . Ph ytochem,
1989, 28( 12): 3477
7  Marsaioli A J, Magalh aes A F, Ruv eda E A, et al . Ph ytochem,
1980, 19: 995
( 2000-02-18收稿 )
Studies on Fatty Acid Composition in the Oil of
Momordica cochinchinensis
   Jilin Provincial Institute fo r Drug Contr ol ( Changch un 130062)  Shang Huijuan , Yuan Chunfang, Wang Yuguang ,
Gao Qipin
   Jilin Provincial Academy o f TCM Wang Wei, Niu Zhiduo , Wang Yongqi
Abstract   To determine the fa t ty acid composition in the oil of Semen Momordicae to evaluate i ts
practical use. Fat ty oi l was obtained by Soxhlet ex t raction w ith pet ro leum ether and converted to methyl
ester deriv ativ es by methanolic potassium hydroxide. Contents of the resultant methyl esters w ere then de-
termined by GC-M S. Eight fat ty acids w ere characterized and determined. Resul ts o f the study may pro-
vide some informa tion fo r the exploi ta tion and utili zation in the oil of seed of Momordicae cochinchinensis
( Lour. ) Spreng.
Key words  Momordica cochinchinensis ( Lour. ) Spreng.  GC-M S  fat ty acid
摘 要 对木鳖子油中脂肪酸组成进行分析 ,采用石油醚提取脂肪油 ,快速甲酯化法制备成甲酯衍生物 , GC-M S
联用技术分析其中的脂肪酸组成和相对百分含量 ,鉴定了 8种脂肪酸成分 ,为开发利用木鳖子资源提供了依据。
关键词 木鳖子  GC-M S 脂肪酸
  Semen Momordicae , the dried and ripe seed of
Momordica cochinchinensis ( Lour. ) Spreng. (Cu-
curbitaceae ) , is a t radi tional Chinese medicine con-
sidered to exhi tbi t a cooling and resolvent effect ,
commonly used as a remedy for w ounds, bruises,
sw el ling , hemo rrhoids and pus[1 ] . It contains a
high percentage of vegetable oil ( 35% ) , though i ts
composition has no t been repo rted since. In order
to exploit and uti li ze i t more effectiv ely, an un-
precedented at tempt to determine i ts fat ty acid con-
tents was ca rried out by GC-M S.
1 Materials andMethods
1. 1  Plant M aterials: Semen Momordicae was pur-
chased from Ji lin Prov incial Drug Dist ribution
·727·中草药  Chinese Traditiona l and He rbal Drug s  2000年第 31卷第 10期
商慧娟  1991年毕业于沈阳药科大学 ,获理学学士学位 , 1997年就读于中国药科大学攻读硕士学位。 曾在国家级杂志发表学术论文多篇 ,目前主要从事中药化学成分研究方面的工作。 通讯地址:吉林省药品检验所 (长春 130062)。
Company in Changchun, China, and identi fied a s
the seed o f Momordica cochinchinensis ( Lour. )
Spreng. by pro fesso r Gao Qipin.
1. 2  Ex traction o f Fa tty Oi l: The seed was ex-
tracted wi th petroleum ether ( 30℃~ 60℃ ) fo r 8
hours in a Soxhlet apparatus. The fa tty oil w as ob-
tained by removing the so lv ent under reduced pres-
sure.
1. 3  Prepa ra tion of Fa tty Acid M ethyl Esters: An
amount o f 300 mg of fat ty oil w as dissolv ed in
ether-hexane ( 2∶ 1) to giv e a 3 mL solution. 2. 5
m L methano l and 2. 5 mL 0. 8 mol /L methano lic
potassium hydroxide w as added, agitated to ensure
complete solution and allow ed to react for 30 min,
af ter which a saturated sodium chlo ride so lution
w as added to separate the o rganic lay er
[ 2] . 1 mL of
the superna tant layer was taken, dried wi th anhy-
drous sodium sulfate, and diluted with hexane to
50 m L.
1. 4  GC-M S Analy sis of Fat ty Acid Methyl Es-
ters: GC-M S was carried out on a Hew let t-Packa rd
Model HP 6890 gas chroma tog raph equipped wi th
a spli t /spli t less injection sy stem and a HP-5 capil-
lary column ( 30 m× 0. 25 mm I. D. ) in combina-
tion wi th a mass-selectiv e detecto r. The ca rrier ga s
w as helium ( 99. 99% ) at an ini tial co lumn pressure
o f 110 k Pa. The split ting ra tio w as 1∶ 30. The
oven temperature was prog rammed from 120℃ to
180℃ at a ra te of 3℃ /min, w hich was held fo r 10
min and then prog rammed a t 2℃ /min to 250℃ .
The injection and ion source tempera tures w ere 270
℃ and 230℃ . The spect ra w ere reco rded at an
ionization energ y of 70 eV. The scan parameter is
f rom 20 to 400.
2  Results
2. 1  The yield o f fat ty oi l was 35% by the Soxhlet
ex traction w ith petro leum ether ( 30℃~ 60℃ ) .
2. 2  By ret rieving in da tabase N IST98 and com-
paring w ith standard spect ra
[3 ]
, 8 fat ty acid methyl
esters were identi fied, which accounted fo r
88. 64% of the total test sample. Th e analytical re-
sults of fa tty acid composi tion of Semen Momordi-
cae i s show n in Table 1。
Table 1  Fatty Acid Composition of Semen Momordicae
No.
Retent ion Tim e
( min)
Component Content
(% )
1 4. 43 decanoic acid methyl ester   0. 96
  ( meth yl caprate)
2 17. 78 h exadecanoic acid meth yl es ter 4. 82
  ( meth yl palmitate)
3 20. 89 h eptad ecanoic acid meth yl es ter 0. 20
  ( meth yl margarate)
4 23. 32 10, 13-octadecadienoic acid 12. 61
  meth yl es ter
5 23. 60 9-octadecenoic acid meth yl es ter 17. 42
  ( meth yl oleate)
6 24. 93 octadecan oic acid m ethyl es ter 51. 68
  ( meth yl stearate)
7 33. 82 11-eicosenoic acid meth yl es ter 0. 29
  ( meth yl aldrich ate)
8 34. 91 eicosanoic acid meth yl es ter 0. 66
  ( meth yl arachidate)
   Acknow ledgement: The autho rs are g rateful
to Prof. Yan Jichang o f Northeast Normal Univ er-
sity fo r assistance in GC-M S analysis.
References
1  Pharmacopoeia of th e People s Republic of China ( the 1st part of
1995 edi tion ) . Guangzh ou: Guangdong Scien tif ic and Tech nolo-
gical Publi shing House, and Bei jing: Ch emical Ind ust rial Pub-
lis hing House, 1995: 48
2  Cheng Z Q, Wu H Q, Zhang G Y. Jou rnal of Ins t rumental Anal-
ysis , 1989, 8( 6): 11
3  Heller S R, Milin G W A. EPA /N IH Mas s Spect ral Data Base.
Vol. 1~ 4. Washing ton: US Governmen t Print ing Off ice, 1978
  编辑部注: 本文经我刊顾问、英文编审史玉
俊研究员修改、审定。
( Reciev ed in Jan. 21st , 2000)
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