US PATENT SUBCLASS 514 / 229.8
.~.~.~.~ Tricyclo ring system having the six-membered hetero ring as one of the cyclos

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514 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

1  DF  DESIGNATED ORGANIC ACTIVE INGREDIENT CONTAINING (DOAI) {29}
183  DF  .~ Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., O,S,Se or Te) or nitrogen as the only ring hetero atoms DOAI {16}
228.8  DF  .~.~ Hetero ring is six-membered and includes at least nitrogen and oxygen as ring hetero atoms (e.g., monocyclic 1,2- and 1,3-oxazines, etc.) {4}
229.5  DF  .~.~.~ Polycyclo ring system having the six-membered hetero ring as one of the cyclos (e.g., maytansinoids, etc.) {2}
229.8.~.~.~.~ Tricyclo ring system having the six-membered hetero ring as one of the cyclos {1}
230.2  DF  .~.~.~.~.~> Ring nitrogen shared by two of the cyclos

DEFINITION

Classification: 514/229.8

Tricyclo ring system having the six-membered hetero ring as one of the cyclos:

(under subclass 229.5) Subject matter in which the six-membered hetero ring is one of the cyclos of a tricyclo ring system.

(1) Note. An example of an active ingredient provided for herein is: [figure]