1,7,8,9-Tetrahydro-5-methoxypyrano(2,3-g)indole-2-carboxylic acid 81257-92-3 Acide 5-methoxy-7,8,9-trihydro-pyranno(2,3-g)indole-2-carboxylique [French] Pyrano(2,3-g)indole-2-carboxylic acid, 1,7,8,9-tetrahydro-5-methoxy-