Chemical Differentiation of Dendrobium officinale and Dendrobium devonianum by Using HPLC Fingerprints, HPLC-ESI-MS, and HPTLC Analyses

Figure 5

Chemical structures of constituents identified in the dried stems of D. officinale by HPLC-ESI-MS analysis. (3) Ferulic acid. (5) Dihydroconiferyldihydro-p-coumarate. (6) Vanillic acid. (7) Syringic acid. (9) Vicenin-2. (10) Apigenin-6-C-β-D-xyloside-8-C-β-D-glucoside. (12) Isoschaftoside. (13) Schaftoside. (14) Vitexin-2′′-O-β-D-glucopyranoside. (15) p-Hydroxycinnamic acid. (16) Vicenin-3. (17) Apigenin-6-C-β-D-xyloside-8-C-β-D-arabinoside. (18) Apigenin-6,8-di-C-α-L-arabinoside. (19) Violanthin. (20) Isoviolanthin. (22) Rutin. (23) Apigenin-6-C-α-L-arabinoside-8-C-β-D-xyloside. (24) Apigenin-6-C-(2′′-O-β-D-glucopyranoside)-α-L-arabinoside. (25) Syringaresinol. (26) Naringenin.