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发明名称
4H-1-BENZOPYRAN-4-ONES AND THEIR PREPARATION PROCESS
摘要
申请公布号
KR1019900001313(B1)
申请公布日期
1990.03.08
申请号
KR1019860000607
申请日期
1986.01.30
申请人
发明人
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主分类号
代理机构
代理人
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