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ChemInform Abstract: trans-4,4a,6,7,8,8a-Hexahydro-8a-methylnaphtho(2,3-b)furan-5,9(5H,9H)- dione.

✍ Scribed by J. K. RAY; G. K. KAR; G. D. NIGAM; K. SIVAKUMAR; H.-K. FUN

Book ID: 112028523
Publisher: John Wiley and Sons
Year: 2010
Weight: 25 KB
Volume: 27
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199610060

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The title compound, C 15 H 20 O 4 , also known as dihydrohelenalin, is a drug obtained from a Chinese plant. It contains a seven-membered ring in a chair conformation and two fivemembered rings in twist conformations. The crystal packing involves O-HÁ Á ÁO hydrogen bonds. ## Related literature Fo

ChemInform Abstract: 9,9′-Thiobis-(1,2,3

ChemInform Abstract: 9,9′-Thiobis-(1,2,3,4,7,8-hexahydro-7-methyl-6H-pyrimido [1,6-a]pyrimidine-6,8-dione).

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5,8-Diethyl-6,9-dithioxo-2,3,5,6,8,9-hex

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9,9′-Thiobis-(1,2,3,4,7,8-hexahydro-7-me

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## Abstract The 6‐(3‐hydroxypropylamino)‐3‐methylpyrimidine‐2,4‐dione (1) did not afford the expected 6‐(3‐chloro‐propylamino)‐ derivative on reaction with thionyl chloride, but, instead, the pyrimidine rings were joined __via__ a sulfur bridge to give 9,9′‐thiobis(1,2,3,4,7,8‐hexahydro‐7‐melnyl‐6_