Stachyose

• α-D-galactopyranosyl-(1→6)-α-D-galactopyranosyl-(1→6)-α-D-glucopyranosyl-(1→2)-β-D-fructofuranosid
• Lupeose
• Cicerose

Fixed

~ 170 ° C

Well wasserslöslich

Template: Infobox chemical / molecular formula search available

Stachyose is a tetrasaccharide of sucrose ( glucose fructose) and two galactose molecules. It belongs to the so-called raffinose family.

Occurrence

This weak sweet-tasting compound is according to the belonging to the Labiatae plant Stachys tuberifera ( " tubers woundwort " ) named in which they occur.

In addition, they may also in other Labiatae and in the legume soybean - from the flour it is obtained by extraction - be detected.

Properties

Stachyose has a melting point of about 170 ° C and does not reduce Fehling's solution. Upon hydrolysis yields 2 moles of a mol stachyose D-galactose, D-glucose and one mole of one mole of D-fructose. The enzyme invertase leads to the products manninotriose and fructose.

Use

Stachyose can not be utilized by endogenous enzymes of the human small intestine. Therefore, it is engaged with the chyme unchanged in the colon where it is decomposed by intestinal bacteria. Therefore, stachyose can be used for gas development in the intestine and thus to flatulence ( flatus ) lead.