prov:value
| - he pyridazinyl ring of formula I, said fused ring having 0-2 heteroatoms; each R is independently selected from H, aliphatic, carbocyclyl, heterocyclyl, aryl, aralkyl, heteroaryl, or heteroaralkyl, wherein each member of R except H is optionally substituted; and n is 1 or 2; provided that when R1 is H, R2 and R3 are not both unsubstituted phenyl; and when R1 is H, R2 and R3 are other than H, halog
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