5-methoxy-1,7,8,9-tetrahydropyrano[2,3-g]indole-2-carboxylic acid

bromo-6 methoxy-8 chromanne

methoxy-8 dihydro-3,4 2H-benzopyranne-1 carbaldehyde-6

methoxy-5 tetrahydro-1,7,8,9 pyranno[2,3-g]indolecarboxylate-2 de methyle

methyl 2-azido-3-(8-methoxychroman-6-yl)acrylate