Abstract: The chemical constituents of fragrance released from fresh flowers of Syringa oblata var. affinis were investigated by means of headspace solid-phase microextraction (SPME) coupled with gas chromatography-mass spectrometry (GC-MS). Lilac aldehyde A-D,lilac alcohol A-D, α-pinene, sabinene, β-pinene, myrcene, D-limonene,eucalyptol, cis-ocimene, benzaldehyde, terpinolene, linalool, benzeneacetaldehyde, α-terpineol, p-methoxyanisole, p-anisaldehyde, (Z,E)-α-farnesene and (E,E)-α-farnesene were the most abundant volatiles released from fresh flowers of S. oblata var. affinis and 39 volatile compounds were identified in this study. The four isomers of lilac alcohol and four isomeric lilac aldehydes were the characteristic components of fragrance of fresh flowers of S. oblata var. affinis. Variation of the main constituents in the volatile fragrance from fresh flowers of S. oblata var. affinis during different florescences were also studied. Headspace SPME-GC-MS is a simple sampling method for measuring the variations of main constituents in volatile fragrance from fresh flowers during different florescence.

Key words: Syringa oblata var. affinis, fragrance, solid-phase microextraction (SPME)