The invention provides novel amino acid derivatives represented by formula (1) as well as their structural isomers and their hydrolysates
In this formula
X and Y are each N or NH,
Z is O or OH,
(1) when X=N and Y=NH, Z=0, and *1 and *3 are double bonds,
(2) when X=NH and Y=N, Z=0, and *2 and *3 are double bonds,
(3) when X=N and Y=N, Z=OH, and *2 and *4 are double bonds, and
R is a side chain derived from a naturally occuring amino acid.
These amino acid derivatives are useful as a component of a seasoning material which gives foods a "thick sour taste" in the neutral pH region.
本发明提供了由式(1)表示的新型
氨基酸衍
生物及其结构异构体和
水解物
在该式中
X 和 Y 分别是 N 或 NH、
Z 是 O 或 OH、
(1) 当 X=N 和 Y=NH 时,Z=0,且 *1 和 *3 为双键、
(2) 当 X=NH 和 Y=N 时,Z=0,且 *2 和 *3 为双键、
(3) 当 X=N 和 Y=N 时,Z=OH,且 *2 和 *4 为双键,且
R 是源自天然
氨基酸的侧链。
这些
氨基酸衍
生物可作为调味料的一种成分,在中性 pH 值区域赋予食物 "浓厚的酸味"。