Taxonomic/functional 2.2 Structural: Intact ring system 2.3 Structural: Cleaved, contracted, and expanded rings (seco-, nor-, and homosteroids) 3 Biological significance 4 Pharmacological actions 5 Biosynthesis and metabolism 5.1 Mevalonate pathway 5.2 Steroidogenesis 5.3 Regulation 5.4 Alternative pathways 6 Metabolism 7 Isolation, structure determination, and methods of analysis 8 Chemical synthesis of steroids 8.1 Microbial transformations 8.2 Partial and total chemical synthesis 9 History…
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