A camsylate salt of (1r,1 R,4R)- 4-methoxy-5"-methyl-6-[5-(prop-1-yn-1-yl)pyridin-3-yl]-3H-dispiro[cyclohexane-1,2-inden-12-imidazole]-4"-amine, pharmaceutical compositions containing the salt and therapeutic uses of the salt for treating Αβ-related pathologies such as Alzheimers Disease, Downs syndrome, β-amyloid angiopathy and conditions such as dementia including dementia of mixed vascular and degenerative origin, pre-senile dementia, senile dementia and dementia associated with Parkinsons disease, progressive supranuclear palsy or cortical basal degeneration.
