E52-IC50A-3.2-8M E52-IC50AY D=3.2 4M E52-IC50AY D=4.8 4M E52-IC50AY D=6.4 4M E52-IC50AYD3.24M E52IC50AYD324M E52-IC50AYD4.84M E52-IC50AYD6.44M E52-IC50B-N D=6.4 E52-IC50B-ND6.4