Detection of new phenylpropanoids from <i>Dendrobium chrysanthum</i>

<p><i>Herba Dendrobii</i> has been documented in the Compendium of Materia Medica, with special efficacy in nourishing Yin and treating diabetes. However, the chemical profile of <i>Dendrobium chrysanthum</i> Lindl. has not been reported yet. The compositions were analysed with UPLC/Q-TOF-MS/MS. 53 compounds were tentatively characterised, and 14 compounds might be new compounds. Some novel lactones of poly-phenylpropanoids were firstly detected, and di-p-hydroxyphenylpropionic acidic p-coumaric acid lactone, a new compound of the first example, was obtained and identified. UPLC/Q-TOF-MS/MS was a feasible and efficient method to discover the unique compounds in complex matrices of <i>D. chrysanthum</i>.