Synonyms:
3,7,8-trihydroxy-3-methyl-10-oxo-1,3,4,10-tetrahydropyrano[4,3-b]chromene-9-carboxylic acid ; fulvic acid ; 4,10-dihydro-3,7,8-trihydroxy-3-methyl-10-oxo-1h,3h-pyrano[4,3-b][1]benzopyran-9-carboxylic acid ; fulvic acid purity 95% ; 1h,3h-pyrano4,3-b1benzopyran-9-carboxylic acid, 4,10-dihydro-3,7,8-trihydroxy-3-methyl-10-oxo-