D-Ascorbic acid, mixt. with (E)-1-(4-((6-O-(6-deoxy-alpha-L-mannopyranosyl)-beta-D-glucopyranosyl)oxy)-2-hydroxy-6-methoxyphenyl)-3-(3-hydroxy-4-methoxyphenyl)-2-propen-1-one, 1-((3,4-dimethoxyphenyl)methyl)-6,7-dimethoxyisoquinoline hydrochloride and 5-hydroxy-6-methyl-3,4-pyridinedimethanol hydrochloride