“…A formula database of known lignans in S. chinensis and S. sphenanthera has been established in our laboratory, which was used to tentatively identify 19 lignans (peaks 18-37) by comparing the exact masses and formulae of their MS and MS/MS data acquired by UPLC-QTOF-MS with those of literatures. Those include angeloylgomisin H (18) [14,15], tigloylgomisin H (19) [14,15], schisandrol B (20) [14,15], benzoylgomision H (21) [15], tigloylgomisin Q (22) [14,15], schisanhernol (23) [15,17], schisantherin B (24) [14,15], schisantherin C (25) [14,15], wuweilignan D (26) [32], schisantherin D (27) [14,16], gomisin K1 (28) [18], wuweilignan L (29) [32], gomisin O (30) [14], gomision M2 (31) [7,14] [17], ␥-schsandrin (32) [14,17] schisandrene (33) [33], benzoylgomisin O (34) [18], tigloylgomisin O (35) [18], gomisin R (36) [14] and pregomisin (37) [14].…”