3-Chloro-2-formyl-4-methylpyridine
3-Chloro-2-formyl-4-methylpyridine ??
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3-Chloro-2-formyl-4-methylpyridine C??? ??, ??, ??
3-Chloro-2-formyl-4-methylpyridine ?? ?? ? ???
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3-Chloro-2-formyl-4-methylpyridine ?? ??
???( 0)?? ??
3-Chloro-2-formyl-4-methylpyridine ?? ??: