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Publication of AT339300BpublicationCriticalpatent/AT339300B/de
AT782376A1974-02-181976-10-21Verfahren zur herstellung neuer 2-carboxy-4-oxo-4h,6h-(2)-benzopyrano-(3,4-f)-(1)-benzopyrane sowie ihrer salze
AT339300B
(de)
Neue 2-carboxy-4-oxo-4h,6h- eckige klammer auf 2 eckige klammer zu -benzopyranoeckige klammer auf 3,4-f eckige klammer zu eckige klammer auf 1 eckige klammer zu -benzopyrane sowie ihre ester und salze und verfahren zu ihrer herstellung