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Class Information
Number: 540/101
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., oxygen, sulfur, selenium or tellurium) or nitrogen as the only ring hetero atoms > Cyclopentanohydrophenanthrene ring system containing > Hetero ring attached directly to the cyclopentanohydrophenanthrene ring system by nonionic bonding > The hetero ring contains plural chalcogens > The hetero ring and acyclic chalcogen are both bonded directly at the 17 position of the cyclopentanohydrophenanthrene ring system
Description: Compounds wherein both the hetero ring and acyclic chalcogen (i.e., oxygen, sulfur, selenium or tellurium) are bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6262042 |
17.beta.-amino and hydroxylamino-11.beta.-arylsteroids and their derivatives having agonist or antagonist hormonal properties |
Jul. 17, 2001 |
| 5792859 |
Intermediates for 20-oxo-17.alpha.,21-diol steroids |
Aug. 11, 1998 |
| 5723638 |
Process for 20-oxo-17.alpha.,21-diol steroids |
Mar. 3, 1998 |
| 5721227 |
17-aryl and 17-heterocyclyl-14.beta.-5.alpha.-androstane, androstene and androstadiene derivatives active on the cardiovascular system, processes for their preparation and pharmaceutical compo |
Feb. 24, 1998 |
| 5108996 |
19-nor-3-keto steroids |
Apr. 28, 1992 |
| 4511511 |
Prednisolone derivatives |
Apr. 16, 1985 |
| 4340538 |
Process for producing 6.alpha.-fluoro-.DELTA..sup.1,4 -3-keto steroids |
Jul. 20, 1982 |
| 4192871 |
Chemical compounds |
Mar. 11, 1980 |
| 4089852 |
Process for the preparation of 21-hydroxy-16-pregnen-20-one derivatives |
May. 16, 1978 |
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