5,7,12,14-tetrahydroxy-pentacene-6,13-dione

6,13-dihydro-pentacene-5,7,12,14-tetraol

13H-pentacen-6-one

3-benzoyl-1,4-dihydroxy-9,10-dioxo-9,10-dihydro-anthracene-2-carboxylic acid

2,4-二甲基二苯甲酮