Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07J
STEROIDS
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41/00
Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring
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C07J41/0033
not covered by C07J41/0005
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C07J41/005
the 17-beta position being substituted by an uninterrupted chain of only two carbon atoms, e.g. pregnane derivatives
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