Ditto is a strange chemical mixture used in warfare and in everyday situations. No one really knows where it came from or who invented it, but it's darn useful (and quite deadly in certain cases, too). Ditto has three isomers. Each isomer has the same molecular formula, but different arrangements of atoms, giving it different chemical properties. The three isomers are named A, B, and C. Ditto A and B are enantiomers, which means they are mirror-images of each other. Ditto C is a meso compound. Ditto Plus is a racemic mixture of Ditto A and Ditto B.