US PATENT SUBCLASS 536 / 6.1
.~.~.~.~ Oxygen containing five-membered hetero ring

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1.11  DF  .~ Carbohydrates or derivatives {15}
4.1  DF  .~.~ O- or S- Glycosides {29}
5  DF  .~.~.~ Cyclopentanohydrophenanthrene ring system {2}
6.1.~.~.~.~ Oxygen containing five-membered hetero ring {2}
6.2  DF  .~.~.~.~.~> Nitrogen, phosphorus or halogen containing
6.3  DF  .~.~.~.~.~> Processes of extracting from plant materials

DEFINITION

Classification: 536/6.1

Oxygen containing five-membered hetero ring:

(under subclass 5) Compounds wherein a five-membered hetero-O-cyclic substitutent is connected directly to a carbon atom of the cyclopentanohydrophenanthrene nucleus.

(1) Note. This subclass includes, for example, neutral saponins and glycosides having an aglycone moeity described as cardenolide. Acid saponins (i.e., triterpenoid saponins) are not subject matter for this subclass. For purposes of classification, saponins which are not designated as acid or neutral are considered neutral and are classified herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

4.1, for acid saponins (i.e., triterpenoid saponins) which are known not to contain the cyclopentanohydrophenanthrene nucleus.

4.4, for aescin or derivatives.