LACCAIC ACID B;LACCAIC ACID B STANDARD;7-[2-Hydroxy-5-(2-hydroxyethyl)phenyl]-3,5,6,8-tetrahydroxy-9,10-dioxo-9,10-dihydro-1,2-anthracenedicarboxylic acid;9,10-Dihydro-3,5,6,8-tetrahydroxy-7-[2-hydroxy-5-(2-hydroxyethyl)phenyl]-9,10-dioxo-1,2-anthracenedicarboxylic acid
