prov:value
| - The preferable combination of the R1, R2, R3, R4, R5, R6, X, Y, Z, and W is such that R1 is hydrogen atom, R2 is amino group, a lower alkylamino group, or a di-lower alkylamino group, R3 is a halogen atom, R4 is a halogen atom, X is nitrogen atom, Y and Z are --CH??? or --CR7 ??? (wherein R7 is a lower alkyl group or a halogen atom), W is --CR8 ??? (R8 is a halogen atom or a lower alkyl group), R5
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