1Sadtler Research Laboratoried Inc.The Standard Infrared Prism Sperctra [M].1980.
2Sadtler Research Laboratoried Inc.The Standard Infrared Grating Spectra [M].1974.
3Watanabe S.Seperation of n-Hexacosanic acid [J].Z Naturforsch,1975,30: 825.
4Segelman A B,Frnsworth N R.Catharanthus alkaloidⅩⅩⅩⅠ :isolation of ajmalicine,pericalline,tetrahydroal-stonine,vindolinine,and ursolic acid from Catharanthus trichophyllus roots [J].J Pharm Sci,1974,63(9): 1419-1422.
5Corrett R E,Johns R B.Identification of pulerulic acid [J].J Chem Soc,1950,1(6): 325.
