.beta.-Resorcinolic acid .beta.-Resorcylic acid 2,4-Dihydroxybenzoic acid 4-Carboxyresorcinol 4-Hydroxysalicylic acid 89-86-1 BRA Benzoic acid, 2,4-dihydroxy- NSC4740 RESORCYLIC ACID, BETA p-Hydroxysalicylic acid