5-(3,4-Dichlorophenyl)-6-hydroxynicotinaldehyde
3-(3,4-Dichlorophenyl)-2-hydroxyisonicotinaldehyde
5-Chloro-4-(3,4-dichlorophenyl)-2-hydroxypyridine
3-Chloro-4-(3,4-dichlorophenyl)-2-hydroxypyridine
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