Bicyclo(4.2.0)octa-1,3,5-trien-7-yl methyl ketone O-acetyloxime ,its CAS NO. is 6813-93-0,the synonyms is BRN 2271493 ; O-Acetyl-1-acetylbenzocyclobutene oxime ; Ketone, bicyclo(4.2.0)octa-1,3,5-trien-7-yl methyl, O-acetyloxime .