Odor-Active Components of Luo Han Guo (Siraitia grosvenorii).

The volatile components -of the dried fruit of Luo Han Guo (Siraitia grosvenorii Swingle) belonging to the family Cucurbitaeae were analyzed by AROMASCOPE® technique using MonoTrap® DCC 18 as an absorbent. A total of 124 volatile components were identified from the headspace aroma solvent extract. The major components were ethanol, butan-l-ol, pentanal, 2-methylbutanal, hexanal, furfural, pent-3-en-2-one, acetic acid, propionic acid, 3- methylbutanoic acid, hexadecanoic acid, and so on. Among them, acetic acid, 3-methylbutanoic acid, and 3-hydroxy-4,5-dimethylfuran-2(5H)-one (sotolon) strongly contributed to the overall aroma of the fruit. Besides, sotolon and 5-ethyl-3-hydroxy-4-methylfuran-2(5H)-one (maple furanone) were responsible for - the characteristic molasses-like aroma of the fruit.