Oxygen 1,2-Ethanediol, monoacetate CAS 542-59-6 Oxygen 2,5-Dihydrofuran CAS 1708-29-8 Oxygen 90-05-1 – Phenol, 2-methoxy- Guaiacol Oxygen Benzaldehyde, 4-methoxy CAS 123-11-5 Oxygen Furan CAS 110-00-9 Oxygen Piperonal CAS 120-57-0 Oxygen Trioxygen CAS 10028-15-6