1H-Indole-2-carboxylic acid, 6-hydroxy-5-methoxy- 2638-99-5 5-Methoxy-6-hydroxyindole-2-carboxylic acid 6-Hmica 6-Hydroxy-5-methoxy-2-indolecarboxylic acid 6-hydroxy-5-methoxy-2-indolylcarboxylic acid