4521-33-9
5-硝基噻吩-2-甲醛
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74693-62-2
1-乙基-2-羟基-4-氧喹啉-3-碳酰肼
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~51%
74693-65-5
1-ethyl-4-hydroxy-N-[(E)-(5-nitrothiophen-2-yl)methylideneamino]-2-oxoquinoline-3-carboxamide