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doi: 10.1111/obr.12843, PMID: [DOI] [PubMed] [Google Scholar] 150

The generic steroid structure drawn above has seven chiral stereocenters (carbons 5, 8, 9, 10, 13, 14 & 17), which means that it may have as many as 128 stereoisomers

One is pigmented and the other is amelanotic
