Polyhydroxylated aromatic compounds for the treatment of amyloidosis and alpha-synuclein fibril diseases

1 . A drug product for disassembling, disrupting or disaggregating amyloid fibrils associated with Alzheimer's disease in a mammal suffering therefrom, comprising a container labeled or accompanied by a label indicating that the drug product is for the disassembly, disruption, or disaggregation of amyloid fibrils associated with Alzheimer's disease, the container containing one or more dosage units each comprising at least one pharmaceutically acceptable excipient and, as an active ingredient, an isolated pure compound selected from the group consisting of the compounds of formula A, formula B, formula D, and formula E:

where:

R is selected from the group consisting of hydrogen, 2,3-dihydroxybenzoyl, 3,4-dihydroxybenzoyl, 2,3,4-trihydroxybenzoyl, and 3,4,5-trihydroxybenzoyl;

R′ is hydrogen or OH;

R 1 and R 2 are independently selected from hydrogen, halogen, C 1-6 alkyl, and C 1-6 alkoxy;

X is selected from hydrogen and the group consisting of

(a) hydroxy, amino, C 1-6 alkylamino, di(C 1-6 alkyl)amino, and cycloamino,

(b) C 1-22 alkyl, C 1-22 alkylthio, and C 1-22 alkylcarboxyl, each optionally substituted with 1 to 5 moieties selected from the group consisting of halogen, hydroxy, mercapto, amino, nitro, C 1-6 alkoxy, C 1-6 alkylthio, and C 1-6 alkylcarboxyl,

(c) aromatic and heteroaromatic groups substituted with 2 or 3 adjacent hydroxy groups, and optionally substituted with 1 to 5 non-interfering substituents,

(d) sugars, optionally substituted with one or more anionic groups selected from sulfate, phosphate, phosphonate, carboxylate, and sulfonate groups,

(e) —C(O)R 3 and —C(O)OR 3 , where R 3 is selected from the group consisting of (a) through (d) above;

and the pharmaceutically acceptable salts thereof but excluding pyrogallol.

2 . The drug product of claim 1 containing only one active ingredient compound.