Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07J
STEROIDS
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1/00
Normal steroids containing carbon, hydrogen, halogen or oxygen, not substituted in position 17 beta by a carbon atom, e.g. estrane, androstane
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C07J1/0003
Androstane derivatives
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C07J1/0011
substituted in position 17 by a keto group
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