5-Methoxy-9-oxo-7,8-dihydro-pyranno(2,3-g)indole [French] 7,8-Dihydro-5-methoxypyrano(2,3-g)indol-9(1H)-one 81258-07-3 Pyrano(2,3-g)indol-9(1H)-one, 7,8-dihydro-5-methoxy-