fig2

Figure 2. The chemical structures of alantolactone compounds. (4) Alantolactone; (5) Isoalantolactone; (6) Costunolide; (7) Dehydrocostus lactone.
Figure 2. The chemical structures of alantolactone compounds. (4) Alantolactone; (5) Isoalantolactone; (6) Costunolide; (7) Dehydrocostus lactone.
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