Jasmololone (compound 1c) is a reduced compound that can be oxidized by manganese dioxide to form the corresponding diketone[1].
Definition
ChEBI: Jasmolone is a secondary alcohol.
References
[1] Crombie L, et al. Oxidative dimerisations of natural rethrolones and related compounds with manganese dioxide[J]. Journal of the Chemical Society C: Organic, 1971: 9-13.