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Methyl 4-oxotetrahydrofuran-3-carboxylate	??4-??????????-3-???????	57595-23-0	C6H8O4
2-(2-Bromoethyl)benzaldehyde	2-(2-?????)??????	22901-09-3	C9H9BrO
2-(difluoromethyl)-5-nitropyridin-4-ol		1805314-41-3	C6H4F2N2O3
4-Chloro-2-(difluoromethyl)-5-nitropyridine		1804755-81-4	C6H3ClF2N2O2
5-Chloro-4-(trifluoromethyl)-2-pyridinecarboxylic acid	5-???-4-(????????)-2-????????	796090-31-8	C7H3ClF3NO2
5-Amino-2 -(difluoromethyl) -4-hydroxypyridine		1804754-52-6