70458-60-5

Upstream product

• 70458-57-0 4,5-dihydro-4-oxo-5-phenylpyrano[3,2-b]indole-2-carboxamide 
• 70458-56-9 ethyl-4,5-dihydro-4-oxo-5-phenylpyrano[3,2-b]indole-2-carboxylate 

Downstream Products

• 70458-62-7 5-Phenyl-2(1H-tetrazol-5-yl)pyrano[3,2-b]indol-4(5H)-one 

Relevant academic research and scientific papers

Indolopyrone tetrazoles and carboxamidotetrazoles having antiallergic activity

Certain novel indolopyrone tetrazoles, carboxamidotetrazoles and their pharmaceutically acceptable salts are disclosed. These compounds are useful as antiallergic agents in mammals.

Synthesis and antiallergy activity of 4-oxopyrano[3,2-b]indoles

A series of 4-oxopyrano[3,2-b]indole carboxylic acids, tetrazoles, and carboxamidotetrazoles has been prepared and tested for antiallergy potential in the rat passive cutaneous anaphylaxis (PCA) assay. Many of the compounds showed activity comparable or s