1 D8G 6-(2-fluorobenzyl)-2,4-dimethyl-4,6-dihydro-5h-thieno[2',3':4,5]pyrrolo[2,3-D]pyridazin-5-one 1.000 2 I0R 6-[(4-hydroxyphenyl)methyl]-2,4-dimethyl-4,6-dihydro-5h-[1,3]thiazolo[5',4':4,5]pyrrolo[2,3-D]pyridazin-5-one 0.840 3 07T 6-(3-aminobenzyl)-4-methyl-2-methylsulfinyl-4,6-dihydro-5h-thieno[2',3':4,5]pyrrolo[2,3-D]pyridazin-5-one 0.778 4 I07 {6-[(3-methoxyphenyl)methyl]-4-methyl-5-oxo-5,6-dihydro-4h-thieno[2',3':4,5]pyrrolo[2,3-D]pyridazin-2-yl}(methyl)sulfaniumolate 0.750