Table 1. Name and structure of ginger compounds investigated.

General name	IUPAC name	Structure
6-Shogol	(4E)-1-(4-hydroxy-3-methoxyphenyl)dec-4-en-3-one
6-Gingerol	5-hydroxy-1-(4-hydroxy-3-methoxyphenyl)decan-3-one
8-Gingerol	5-hydroxy-1-(4-hydroxy-3- ethoxyphenyl)dodecan-3-one
10-Gingerol	5-hydroxy-1-(4-hydroxy-3-methoxyphenyl)tetradecan-3- one