4-CBCB

4-Carboxyl benzocyclobutene

Bicyclo[4.2.0]octa-1,3,5,7-tetraene-3-carboxylic acid

Bicyclo[4.2.0]octa-1,3,5-triene-3-carboxylic acid (7CI,8CI,9CI)

4-CBCB 4-Carboxyl benzocyclobutene