Study on the C5-Pathway of Chlorophyll Biosynthesis in Euglena gracilis Klebs The 13C-NMR Features of Natural Taxane Diterpenoid Compounds Multi-components compatibility theory of Chinese materia medica and IGD 13C-NMR coupling fingerprint Isolation and identification of vaccarin from Vaccariae Semen Isolation and identification of vaccarin from Yaccariae Semen Studies on the Chemical Constituents of the Leaves of Crataegus pinnatifida Bge. var. major N. E. Br.