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by saturdaysaint 5161 days ago
Indeed, and there's been much discussion that the chemistry that makes Lunesta patentable is trivial, basically a patent for its own sake.

"a single isomer drug rarely offers a therapeutic advantage over the mixture of isomers from which it is derived. However, the single isomer is patentable distinct from its multiple-isomer origin. Thus, the drug company can get a monopoly."

http://insomnia-relief.com/information/?p=49