Is Oleoresin Capsicum spray base or acid?

Though it is hardly soluble in water, I would chemically consider OC (pepperspray, (CH3)2CHCH=CH(CH2)4CONHCH2C6H3-4-(OH)-3-(OCH3) as weak base rather than acid, the amide CONH-group being the most significant group which is more base (C-NH) then acid (C=O).