4-carboxaldehydebenzocyclobutene;Bicyclo[4.2.0]octa-1,3,5-triene-3-carbaldehyde;4-CHOBCB 4-Carboxaldehydebenzocyclobutene;Bicyclo[4.2.0]octa-1,3,5-triene-3-carboxaldehyde;bicyclo[4.2.0]octa-1(6),2,4-triene-4-carbaldehyde;4-carbaldehydebenzocyclobutene;4-Carboxaldehydebenzocyclobutene ISO 9001:2015 REACH