(-)-6α,16,19-Trihydroxykaurane-18-oic acid 18,6-lactone
(-)-6α,16,19-Trihydroxykaurane-18-oic acid 18,6-lactone ??
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(-)-6α,16,19-Trihydroxykaurane-18-oic acid 18,6-lactone ?? ?? ? ???
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(-)-6α,16,19-Trihydroxykaurane-18-oic acid 18,6-lactone ?? ??
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