Simultaneous determination of β-elemene, curcumol, germacrone and neocurdione in olatile oil of Curcuma phaeocaulis and vinegar products by GC-MS Determination of curdione, curcumol, germacrone, and β-elemene in processed Curcumae Rhizoma from different habitats Comparison on four sesquiterpenes in volatile oil of differently-processed Curcuma Rhizoma Comparison on four sesquiterpenes in volatile oil of differently-processed Curcuma Rhizoma Comparison of content of curdione, curcumol, germacrone and β-elemene in different varieties of vinegar backed Rhizoma Curcuma Discussion translation of geraniol HPLC Fingerprints of volatile oil of Curcuma wenyujin in Zhejiang Province