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Priority to KR7301438ApriorityCriticalpatent/KR780000198B1/en
Priority to KR7801103Aprioritypatent/KR780000237B1/en
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Publication of KR780000198B1publicationCriticalpatent/KR780000198B1/en
KR7301438A1973-08-291973-08-29Process for production of 2-carboxy-4-oxo 4h,1oh-(2)-benzopyrano-(4,3g)-(1)-benzopyranes and their salts
KR780000198B1
(en)