3-hydroxy-4-[2-(4-nitrophenyl)hydrazinyl]cyclohexa-3,5-diene-1,2-dione

三苯基甲烷

4-Nitro-2,6-bis-p-tosyloxy-phenol

3,4,6-trihydroxy-1-methyl-5H-benzo[7]annulen-5-one

2,5-Dimethoxy-3-p-tosyloxy-phenol