C9H20O9Cl
Ratio of one oxygen per carbon and an additional Cl! If it were fully saturated aliphatic… C9H20 would be nonane or an isomer. No cyclics. No double bonds. Add 9 oxygens and they would all need to be alcohols. Geminal diols are very unstable so that would be one alcohol per carbon. That leaves one chlorine which can only occur in this compound if it replaces a hydrogen somewhere… so not H20 but H19.
I don’t think this compound is possible.