1-Anthracenecarboxylic acid, 9,10-dihydro-5,6,8(or 5,7,8)-trihydroxy-9,10-dioxo- 65502-31-0 9,10-Dihydro-5,6,8(or 5,7,8)-trihydroxy-9,10-dioxo-1-anthracenecarboxylic acid