Cebranopadol can be obtained from 1,4-Cyclohexanedione Monoethylene Acetal (C987955) which is used in the preparation of series of potent analgesic compounds. 1,4-Cyclohexanedione Monoethylene Acetal (C987955) is also used as a building block in the synthesis of tritium labelled probes for the autoradiography study of the dopamine reuptake complex.