US PATENT SUBCLASS 540 / 229
.~.~.~.~.~.~.~ Sulfur containing substituent

Current as of: June, 1999
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540 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS {6}
200  DF  .~.~ Hetero ring is four-membered containing nitrogen and having chalcogen double bonded directly to a ring carbon which is adjacent to the ring nitrogen {7}
203  DF  .~.~.~ Polycyclo ring system containing the hetero ring as one of the cyclos {4}
205  DF  .~.~.~.~ The ring nitrogen is shared by a six-membered ring {2}
214  DF  .~.~.~.~.~ The six-membered ring contains sulfur {1}
215  DF  .~.~.~.~.~.~ 1-thia-5-aza-bicyclo(4.2.0)octane (including unsaturated; e.g., cepham, etc.) {9}
229.~.~.~.~.~.~.~ Sulfur containing substituent

DEFINITION

Classification: 540/229

(under subclass 215) Compounds in which include sulfur bonded directly or indirectly to the cepham or cephem ring system.

(1) Note. This subclass provides for salts containing sulfur, such as that formed by reacting Cephalosporin C with sodium thiosulfate, in addition to compounds in which sulfur is attached by nonionic bonding.

SEE OR SEARCH THIS CLASS, SUBCLASS:

226, for compounds which contain a cepham or cephem ring system having a sulfur containing substituent and a hetero ring containing substituent.