Just a bit of an expansion on the ketone note, the likely reason why they were referred to as the side of a secondary alcohol despite not being considered and oxide is because the way that ketones ar emade from an alcohol is through the oxidation of the alcohol through repeated distillations at...
I'm pretty sure the film that they saw was Gantz:O based on an extra where they say that "Ke••• Koba (assumedly Kendo) is a surprisingly good voice actor"