Studies on Chemical Constituents from Dracocephalum moldavica L. Studies on chemical constituents in herbs of Dracocephalum moldavica Simultaneous determination of tilianin and agastachoside in Dracocephalum moldavica by HPLC Simultaneous determination of tilianin and agastachoside in Dracocephalum moldavica by HPLC Research on separation and purification of extract from Dracocephalum moldevica with macroporous resins