| 21. | Attempts towards elucidating the structure of the molecule used the lactone ring as a starting point.
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| 22. | Each dye molecule in " Zubbles " is a structure known as a lactone ring.
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| 23. | At a threshold concentration, LasR binds N-( 3-oxododecanoyl )-homoserine lactone.
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| 24. | The plant is somewhat toxic to mammals and insects due to the presence of the lactone tenulin.
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| 25. | "' Cynaropicrin "'is a sesquiterpene lactone exhibiting a range of diverse bioactivities.
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| 26. | In one industrial synthesis of oxandrolone the key lactone-forming step is an organic reduction-esterification.
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| 27. | Artemisinin is a sesquiterpene lactone with an endoperoxide bridge and has been produced semisynthetically as an antimalarial drug.
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| 28. | However, subjecting the lactone ring to air, water or pressure, causes the ring to open.
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| 29. | Andrographolide is the major constituent extracted from the leaves of the plant and is a bicyclic diterpenoid lactone.
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| 30. | Rhizoxin is a 16-membered lactone ring connected to an oxazole ring by a long unsaturated chain.
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