| Derivative Compounds | Substituent Groups |
| NP-1: N1-(4-hydroxybenzoyl)-3-methyl-5-phenyl-4 (N-4-benzylphenylazo)-1,2-diazole) |
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| NP-2: N1-(4-hydroxybenzoyl)-3-methyl-5-phenyl-4 (N-4-chlorophenylazo)-1,2-diazole) |
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NP-3: N1-(4-hydroxybenzoyl)-3-methyl-5-phenyl-4 (N-4-nitrophenylazo)-1,2-diazole) |
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| NP-4: N1-(4-hydroxybenzoyl)-3-methyl-5-phenyl-4 (N-4-hydroxyphenylazo)-1,2-diazole) |
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| NP-5: N1-(4-hydroxybenzoyl)-3-methyl-5-phenyl-4 (N-4-aminodimethylphenylazo)-1,2-diazole) |
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