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3-Stereoisomerism in compounds with
two stereocentres:
Diastereomers and meso structure:
The total number of stereoisomers
will not exceed 2n
where n is the number of chiral
carbons.
127
Example: 2,3,4-trihydroxybutanal
A and C are diastereomers
B and D are diastereomers
128
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