CAS 4575-53-5 appears in our catalog under these names: cis-Tonghaosu, (2Z)-2-(Hexa-2,4-diyn-1-ylidene)-1,6-dioxaspiro(4.4)non-3-ene, (Z)-2-(2,4-Hexadiynylidene)-1,6-dioxaspiro[4.4]non-3-ene, cis-Tonghaosu, 96.96%. Offered by: TargetMol, Biosynth, Chemat, MedChemExpress. Available pack sizes: 10mg, 50mg, 1mg, 5mg, 25mg, 10 mg, 25 mg, 1 mg.