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and racemic mixtures are assigned discrete CAS Registry Numbers: -epinephrine has 51-43-4, -epinephrine has 150-05-0, and racemic -epinephrine has 329-65-7.
* Different phases do not receive different CAS RNs (liquid water and ice both have 7732-18-5), but different crystal structures do (carbon in general is 7440-44-0, graphite is 7782-42-5 and diamond

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