7,9-Di-tert-butyl-1-oxaspiro[4.5]deca-6,9-diene-2,8-dione

7,9-Di-tert-butyl-1-oxaspiro[4.5]deca-6,9-diene-2,8-dione, certified reference material, TraceCERT^®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland