Fig. 4

Determination of the contents of taxoids in T. fuana and T. yunnanensis. a The contents of paclitaxel and six intermediates were quantified by a UPLC-MS/MS method. A P value < 0.001 was considered to be statistically significant and indicated by “*”. b Representative chromatograms of cephalomannine in T. yunnanensis and T. fuana in the positive ion mode. c Representative TIC chromatograms of six taxoids in T. yunnanensis and T. fuana in the positive ion mode. 10-DAB:10-deacetylbaccatin III; BAC: baccatin III; DAP: 10-deacetylpaclitaxel; CEP: cephalomannine; PTX: paclitaxel; 7-E-DAP: 7-epi 10-desacetyl paclitaxel; and 7-E-PTX: 7-epipaclitaxel