Chemical constituents in roots of Phyllanthus emblica Chemical constituents in barks of wild Phyllanthus emblica Chemical constituents from Osbeckia chinensis Chemical constituents from Phyllanthus reticulates var. glaber Study on quantitative methods of Cleistocalycis Operculati Cortex Chemical constituents from Osbeckia chinensis Chemical constituents in leaves ofEuphorbia soongarica