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Priority claimed from DE19742407631external-prioritypatent/DE2407631A1/en
Application filed by Boehringer Sohn IngelheimfiledCriticalBoehringer Sohn Ingelheim
Priority to AT782376ApriorityCriticalpatent/AT339300B/en
Publication of ATA782376ApublicationCriticalpatent/ATA782376A/en
Application grantedgrantedCritical
Publication of AT339300BpublicationCriticalpatent/AT339300B/en
AT782376A1974-02-181976-10-21
PROCESS FOR PREPARING NEW 2-CARBOXY-4-OXO-4H, 6H- (2) -BENZOPYRANO- (3,4-F) - (1) -BENZOPYRANES AND THEIR SALTS
AT339300B
(en)
NEW 2-CARBOXY-4-OXO-4H, 6H-ANGULAR CLAMP ON 2 ANGULAR CLAMP TO -BENZOPYRANO-ANGULAR CLAMP ON 3.4-ANGLE CLAMP TO ANGLE CLAMP ON 1 ANGLE CLAMP TO -BENZOPYRANE AND YOUR ESTERS AND SALTS TO I AND PROCEDURE MANUFACTURING