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Home > Organic Chemistry > Lactones (Find 240 items)

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Elementary Substance

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Lactones

CLASTO-LACTACYSTIN BETA-LACTONE

(155975-72-7)

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ε-Decalactone

(5579-78-2)
Spices for food.

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N-[(3S)-Tetrahydro-2-oxo-3-furanyl]butanamide

(67605-85-0)
Butyryl-L-homoserine lactone is a short acylhomoserine lactone isolated from Pseudomonas aeruginosa in 1995 and demonstrated to be a quorum sensing modulator in biofilms. Acylhomoserine lactones have been detected in hundreds of bacterial species and, while the homologues vary between species and strains, the homoserine lactones are the major chemical modulators of within and between cell communication and regulation. The most significant variable defining the function of the homoserine lactone

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ANHYDROERYTHROMYCIN A

(23893-13-2)
Anhydroerythromycin A is a degradation product of erythromycin formed by a complex internal rearrangement of erythromycin A on exposure to acidic conditions. In acid, erythromycin A forms the enol ether and then undergoes a second internal cyclisation of the C12–OH and C9 enol to afford the ketal, anhydroerythromycin A. Anhydroerythromycin A is an important analytical standard for erythromycin A stability studies.

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BISTHEONELLIDE A

(105304-96-9)

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Spiramycin III

(24916-52-7)

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Avermectin B2a

(65195-57-5)

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Desertomycin

(12728-25-5)

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4-[(Z)-2-hydroxy-5-methyl-7-[(4Z,6Z,10Z)-3-methyl-12-oxo-1-oxacyclododeca-4,6,10-trien-2-yl]-4-oxooct-6-enyl]piperidine-2,6-dione

(134869-15-1)

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erythromycin A methoxime

(53066-26-5)
Lexithromycin is an early semi-synthetic erythromycin, prepared by reaction of the 9-keto moiety to methyl oxime. The structural change improves the pH stability profile and hydrophobicity of lexithromycin for better in vivo absorption. This same rationale was used to greater effect with roxithromycin and, as a result, lexithromycin was quickly superseded and has not been not extensively studied. Like all erythromycins, lexithromycin shows broad spectrum antibacterial activity and acts by bindin

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Lactone refers to an organic substance that contains both a carboxyl group and a hydroxyl group in the same molecule, and the two are dehydrated. Organic compounds with one and only one ester group in the ring. Common ones are x=2, 3 or 4, which are called β-, γ- or δ-lactones, respectively. They are generally insoluble in water, easily soluble in organic solvents such as ethanol and ether, and their density is generally lower than that of water.

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