... Tetrahedron. Volume 59, Issue 8, 17 February 2003, Pages 1265–1275. ... 2 ICZ has a strong affinity to the TCDD (2,3,7,8-tetrachlorodibenzo-p-dioxin, 2) receptor (Ah-receptor), and recently it has been demonstrated that 6-formylindolo[3,2-b]carbazole 3 (3a) has an extremely ...