| http://www.w3.org/ns/prov#value | - Pregnene steroids", as the term is used herein, are aliphatic polycyclic hydrocarbons with a four-ring steroidal structure, at least one double bond in the A-ring, methylation at the 10-position and 13-position, ethylation (including unsaturated groups) at the 17-position and an oxo, hydroxyl or hydroxyl derivative such as alkoxy, ester, benzoate, cypionate, sulfate or glucuronide, at the 3-posit
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