Antidiabetic 4-hydroxy-2-furoic acids
First Claim
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1. A compound having the formula IIa, IIb or IIc:
- or a pharmaceutically acceptable salt thereof.
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Abstract
Substituted 4-hydroxy-2-furoic acids are obtained by the fermentation of an asterriquinone, which is a natural product having a 2,5-dioxy-3,6-bis(indolyl)quinone structure. The compounds modulate insulin receptor tyrosine kinase activity and may be useful in the treatment of diabetes and other diseases or conditions characterized by impaired endogenous insulin production or an impaired response to endogenous insulin.
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16 Claims
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1. A compound having the formula IIa, IIb or IIc:
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or a pharmaceutically acceptable salt thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16)
in a medium containing a culture having the identifying characteristics of ATCC 53771.
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16. The method of synthesizing the compounds having the formula IIa, IIb or IIc, as recited in claim 15, wherein the medium comprises a culture of ATCC 53771.
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14. A method of treating a disease or condition characterized by inadequate modulation of insulin receptor tyrosine kinase activity, comprising the administration of a therapeutically effective amount of a compound having formula IIa, IIb or IIc, or a pharmaceutically acceptable salt thereof.
Specification