SEARCH Articles Figures Tables 2- Carboxy-3,6-dihydroxy-4- 2-Anilino-2,5-dihydroxy 2-Anilino-5 -chlor 3- Anilino-5- 4 -chlor 4-Anilino-2-carboxy-3,6-dihydroxy 4-Anilino-4 -chlor-2,5-dihydroxy 4’-Chlor-2,5-dihydroxy-4-