Studies on triterpenoid constituents from Rabdosia japonica var.galaucocalyx Studies on Chemical Constituents in the roots of Rabdosia japonica(Burm.f).Hara var.glaucocalyx(Maxin)Hara. Simultaneous determination of 4 diterpenoids in Rabdosia japonica var.glaucocalyx by HPLC-ESI-MS/MS and cluster analysis Studies on Diterpenoid Constituents in Rabdosia japonica (Burm.f.) Hara A new abietane diterpene glycoside from roots of Rabdosia japonica var. glaucocalyx