{'fraction_non_alphanumeric': 0.04103671706263499, 'fraction_numerical': 0.0367170626349892, 'mean_word_length': 4.590361445783133, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Structure of 23,24-dinor-5α-cholan-12-one

The crystal and molecular structure of 23,24-dinor-5α-cholan-12-one has been determined. Rings A, B and C have a chair conformation, ring D a half-chair conformation. All rings are trans connected. The crystal structure of the title compound confirms the link between a different kinetic behaviour during reduction of 12-oxosteroids with LiAlH 4 and a different orientation of the π system of the ketone functional group