[Study on the chemical constituents in the volatile oils of the flowers of Tibetan medicine Rhododendron anthopogon].

Objective: To study the chemical constituents of the volatile oils from the flowers of Rhododendron anthopogon D. Don.

Methods: The volatile oils from the flowers of Rhododendron anthopogon D. Don were extracted by water steam distillation and its chemical constituents were separated and identified by GC-MS. The content of each constituent was determined by area normalizetion method.

Results: Fifty peaks were separated and forty seven components were identified, which constituted about 97.44% of the total essential oils.

Conclusions: The main compounds are N-acetyl-1, 2, 3, 4-tetrahydro-isoquinoline (29.23%), 2-Ethoxypropane (12.47%), 3-Methyl-6-tert-butylphenol (10.83%), 3-Methyl-5-phenyl-isothiazole (6.38%), Diphenylamine (4.20%), N-ethyl-1, 2,3,4-tetrahydro-naphthalenamine (3.62%), Pentacosane (3.12%) and Tricosane (3.06%).