2DC DDC DHC (3ALPHA,8ALPHA,22R)-CHOLEST-5-ENE-3,20,22-TRIOL C27 H46 O3 Back to the tutorial.
The 27 carbon steroid and the four rings of the steroid are labeled A,B,C and D.
The methyl groups labeled 18 and 19 are called angular methyl groups -CH3 and
double bond >C=C< between carbon atoms 5 and 6 and alcohol at carbon 3, 20 and 22.
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