Objective: To study the volatile oils in flower and stem of Lonicera japonica. Thunb.
Method: GC-MS.
Results: 36 constituents are isolated and identified in all, of which 28 from Flos Lonicerace and 26 from Caulis Lonicerae. 18 compounds are found simultaneously in both crude drugs and they account for 85.23%, 83.42%, respectively. Palmatic acid and linoleic acid are the highest principles.
Conclusion: The volatile oils are highly similar to each other.