| http://www.w3.org/ns/prov#value | - 9(11) when R11 is a hydrogen atom, (b) 9??,11??-epoxide when R11 is an oxygen atom and between C11 and R11 is a single bond, and (c) a ketone when R11 is an oxygen atom and between C11 and R11 is a double bond; R16 is a hydrogen atom or methyl group; R17 is a hydrogen atom alkyl of 1 thru 5 carbon atoms, phenyl substituted with zero thru 2 chlorine atoms, trichloromethyl, or trifluoromethyl groups
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