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An aminosalicylic acid is any amino derivative of salicylic acid, especially 4-aminosalicylic acid, an antibiotic used to treat tuberculosis.
An aminosalicylate is any salt or ester of aminosalicylic acid.
Asacol gets its name from its chemical structure. It is 5-aminosalicylic acid (5-ASA).
Para-Aminobenzoic Acid
Its a base and reacts with HCl to form a salt : para-Hydroxyanilinium Chloride