Chemical constituents in stem bark of Syringao blata Chemical constituents in seed crust of Syringa oblata Phenotypic Variation of Syringa oblata Lindl. Quantitative determination of syringopicroside in leaves of Syringa oblata by RP-HPLC Chemical constituents from seeds of Syringa oblata Chemical components in essential oils from Syringa oblata A new iridoid from leaves of Syringa oblata