6Paramjit K K and Kenneth M BI Role of the cationic residues arginine 14 and lysine 48 in the function of the cardiotonic polypeptide anthopleurin B.J Bio Chem,1994,269(2):921.
7Paul D E,Dunlap R B, Polllard,A L. et al. Carbon-13 nuclear magnetic resonance of 5-substituted uracils. J Amer Chem Soc, 1973;95(13) :4398.
8Alan J J,Winkely M W,Grant D M,et al.Carbon-13:naturally occurring nucleosides.Proc Nat Acad Sei.1970:65(1)27.
9Goldstein J H,Tarpey A R, Carbon-13 NMR spectra of uracil,thymine and the 5-halouracils, J Amer Chern Soc. ,1971;93(15) :3573.
10Knghts B A. The analysis of plant sterols in feces. Mere Soc Endocrinal,. 1967;16:211.