1, raffinose: oligosaccharide, composed of multiple glucose molecules. Different from other reducing oligosaccharides and polysaccharides, raffinose is non-reducing and will not produce reducing agent in chemical reaction.

2. Stachys: it is an oligosaccharide, which is more common in soybeans. It is composed of grape semi-nine essence, semi-nine essence and mannan oligosaccharide, belonging to reduced trisaccharide.