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2 votes
0 answers
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Is there a formal definition of “identical” molecules?

I was reading about atropisomers and their impacts on drug design, and I started wondering whether we have a formal definition for identical molecules. Atropisomers are not the same molecules because ...
Akash's user avatar
  • 335
1 vote
1 answer
166 views

How are non-racemic drugs produced?

In many cases the L- or S- stereoisomer of organic compounds is vastly more bioactive than other enantiomers. So we see pharmaceutical companies producing escitalopram (i.e., S-citalopram), ...
feetwet's user avatar
  • 3,340
1 vote
2 answers
2k views

Number of chiral centers in penicillin V

I have often seen that in many drugs chirality plays a role. So I was trying to analyze the structure of Penicillin V. What is number of chiral centers in the structure of penicillin V? Is the ...
tachyon's user avatar
  • 21
14 votes
2 answers
3k views

Effect of enatiomers in pharmaceuticals [closed]

Often (or always?) one enantiomer of a certain drug will be effective and the other ineffective or harmful. The famous example is thalidomide, where one enantiomer caused mutilation of the unborn ...
RobChem's user avatar
  • 9,802
21 votes
3 answers
3k views

What are known examples of drugs that racemize/stereoconvert in vivo, and how are they converted?

It is known that although only the (S)-enantiomer of the infamous sedative thalidomide possesses teratogenic properties, it is not very useful to administer the pure (R)-enantiomer since it is ...
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