(8α,13ξ)-3-Oxo-5β,9-dimethyl-19,20-dinorlabd-4(18)-en-15-oic acid
(8α,13ξ)-3-Oxo-5β,9-dimethyl-19,20-dinorlabd-4(18)-en-15-oic acid ??
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(8α,13ξ)-3-Oxo-5β,9-dimethyl-19,20-dinorlabd-4(18)-en-15-oic acid C??? ??, ??, ??
(8α,13ξ)-3-Oxo-5β,9-dimethyl-19,20-dinorlabd-4(18)-en-15-oic acid ?? ?? ? ???
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(8α,13ξ)-3-Oxo-5β,9-dimethyl-19,20-dinorlabd-4(18)-en-15-oic acid ?? ??
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