1.The following two conclusions can be proved. 1. G is the non-connection critical hchart, that is, there are at least the degree of 2a (G)less than or equal to that of the acme of 3/2 h lin G.
3.latibracteata with bioactivity-guided fractionated. Comparing with the standard spectra of chromatography chart such as MS, 1H NMR and 13C NMR, compound 1# and compound 2# were primarily identitied as fatty alcohol and salicylic acid easter, compound 3# and compound 6# were identified as β-sitosterol and stearic acid.
