Material mixture containing rubusoside or alpha glycosylrubusoside, for enhancing sweet taste

A substance mixture comprising compounds of general formula (I),

• wherein m and n independently represent 0 to 50,
• the substance mixture comprising:
• (a1) less than 50% by weight rubusoside (m+n=0),
• (a2) more than 10% by weight alpha-glycosyl rubusosides with a total of 3 glucose units (m+n=1),
• (a3) more than 15% by weight alpha-glycosyl rubusosides with a total of 4 glucose units (m+n=2),
• (a4) more than 5% by weight alpha-glycosyl rubusosides with a total of 5 glucose units (m+n=3), and
• (a5) less than 6% by weight steviol monoside,
• wherein the amount of all components (a1) to (a5) together adds up to at least 80% by weight and the remaining amount comprises water, glycerol, starch degradation products, proteins, fatty acids and/or fatty acid esters.