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 (class 540, subclass 1) > Oxygen containing hetero ring (e.g., dioxirane, etc.) > The hetero ring is six-membered > Polycyclo ring system having the hetero ring as one of the cyclos > Tricyclo ring system having the hetero ring as one of the cyclos > The tricyclo ring system consists of three six-membered cyclos (e.g., xanthene, etc.) > Chalcogen bonded directly to the hetero ring > Patents

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Class Information
Number: 549/392
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 (class 540, subclass 1) > Oxygen containing hetero ring (e.g., dioxirane, etc.) > The hetero ring is six-membered > Polycyclo ring system having the hetero ring as one of the cyclos > Tricyclo ring system having the hetero ring as one of the cyclos > The tricyclo ring system consists of three six-membered cyclos (e.g., xanthene, etc.) > Chalcogen bonded directly to the hetero ring
Description: Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to the hetero ring of the tricyclo ring system.

Sub-classes under this class:

Class Number	Class Name	Patents
549/393	Having -c(=x)-, wherein x is chalcogen, bonded directly to the tricyclo ring system	47

Patents under this class:

1 2

Patent Number	Title Of Patent	Date Issued
7491832	Sulfonate compound and fluorescent probe using the same	Feb. 17, 2009
7465814	Sulfonate compound and fluorescent probe using the same	Dec. 16, 2008
7329687	Flavanoid compounds as chemotherapeutic, chemopreventive, and antiangiogenic agents	Feb. 12, 2008
7318991	Heterocycle-bearing onium salts	Jan. 15, 2008
7244760	Methods for preparation and use of psorospermin analogs	Jul. 17, 2007
7019024	Pharmaceutical for treatment of neurological and neuropsychiatric disorders	Mar. 28, 2006
7015194	Pharmaceutical composition comprising factor VIIa and anti-TFPI	Mar. 21, 2006
6384045	Tricyclic and tetracyclic pyrones	May. 7, 2002
6204396	Method for producing calcium fulvate from humus material	Mar. 20, 2001
6147229	Method for producing magnesium fulvate from humus material	Nov. 14, 2000
6117869	Compounds for and methods of inhibiting matrix metalloproteinases	Sep. 12, 2000
5981774	Compounds for the treatment of hepatoma	Nov. 9, 1999
5977077	Xanthone analogs for the treatment of infectious diseases	Nov. 2, 1999
5958970	Tricyclic and tetracyclic pyrones	Sep. 28, 1999
5883256	Process for removing aromatic heterocyclic compounds product-containing solutions	Mar. 16, 1999
5877030	Process for creating molecular diversity and novel protease inhibitors produced thereby	Mar. 2, 1999
5741813	Compounds for the treatment of hepatoma	Apr. 21, 1998
5625081	Fluorescent dye intermediates	Apr. 29, 1997
5623080	Fluorone and pyronin Y derivatives	Apr. 22, 1997
5563278	Angiotensin II antagonists	Oct. 8, 1996
5563169	Tricyclic heterocyclic compound	Oct. 8, 1996
5516794	Xanthone derivatives, their preparation and use	May. 14, 1996
5495005	Synthesis and pharmacological activity of a series of novel xanthone derivatives	Feb. 27, 1996
5409951	Fungicidally active compounds	Apr. 25, 1995
5380749	Thioxanthenone antitumor agents	Jan. 10, 1995
5346917	Thioxanthenone antitumor agents	Sep. 13, 1994
5300646	Heterocyclic amine derivatives, their production and use	Apr. 5, 1994
5281620	Compounds having antitumor and antibacterial properties	Jan. 25, 1994
5264577	Cyclic amino acids and derivatives thereof	Nov. 23, 1993
5176854	Non-linear optical device	Jan. 5, 1993
4999351	7-aryl and heteroaryl ethers of desacetylforskolin	Mar. 12, 1991
4999373	Antihyperlipidemic and antiatherosclerotic compounds and compositions	Mar. 12, 1991
4927849	Sulfonamido derivatives inhibiting the aldose reductase enzyme system and pharmaceutical compositions containing them	May. 22, 1990
4831052	Flavone carboxylic acid derivatives	May. 16, 1989
4816479	Xanthone derivatives and process for producing the same	Mar. 28, 1989
4661607	Furoxanthone derivatives useful as diuretics	Apr. 28, 1987
4585876	Novel xanthones and thioxanthones	Apr. 29, 1986
4571405	Anti-allergic chromone- or thiochromone-5-oxamic acid derivatives, compositions, and method of use therefor	Feb. 18, 1986
4539412	7-Hydroxylucanthone, 7-hydroxhycanthone and their analogs	Sep. 3, 1985
4335046	Polyester compositions, shaped articles obtained from them and processes for preparing them	Jun. 15, 1982
4308210	Nanaomycin B and therapeutic compositions containing same	Dec. 29, 1981
4299772	Xanthenone-yl esters of phosphoric and phosphonic acids	Nov. 10, 1981
4290954	Tetrahydroxanthone derivatives	Sep. 22, 1981
4275209	Xanthene and thioxanthene derivatives	Jun. 23, 1981
4221800	Cycloalkenochromone	Sep. 9, 1980
RE29935	N-Substituted imidazoles and their salts	Mar. 13, 1979
4118508	Pharmacologically effective substance from plants belonging to the family of Labiatae	Oct. 3, 1978
4107317	Chroman derivatives	Aug. 15, 1978
4070373	Tricyclic aminoalkyl derivatives	Jan. 24, 1978
4001419	1'-Substituted xanthene-9-spiro-4'-piperidine derivatives	Jan. 4, 1977