Photochemical reactions of 3-methylindole,carbazole,benzimidazole with fusedpolycyclic aromatic hydrocarbons in solid state were investigated,The structures of
4-Amino-4-deoxy-4′-demethylepipodophyllotoxin has beendirectly synthesized from 4′-demethylepipodophyllotoxin and HN<sub>3</sub>in the presence of BF3·Et