Heterocyclic compounds containing six-membered rings having three nitrogen atoms as the only ring hetero atoms, not provided for by group C 07 D 251/00 [2]
253
/
02
•
not condensed with other rings [2]
253
/
04
•
•
1,2,3-Triazines [2]
253
/
06
•
•
1,2,4-Triazines [2]
253
/
065
•
•
•
having three double bonds between ring members or between ring members and non-ring members [5]
253
/
07
•
•
•
•
with hetero atoms, or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms [5]
253
/
075
•
•
•
•
•
Two hetero atoms, in positions 3 and 5 [5]
253
/
08
•
condensed with carbocyclic rings or ring systems [2]
Heterocyclic compounds containing rings having three nitrogen atoms as the only ring hetero atoms, not provided for by groups C 07 D 249/00 to C 07 D 253/00 [2]
255
/
02
•
not condensed with other rings [2]
255
/
04
•
condensed with carbocyclic rings or ring systems [2]
257
/
00
Heterocyclic compounds containing rings having four nitrogen atoms as the only ring hetero atoms [2]
257
/
02
•
not condensed with other rings [2]
257
/
04
•
•
Five-membered rings [2]
257
/
06
•
•
•
with nitrogen atoms directly attached to the ring carbon atom [2]
257
/
08
•
•
Six-membered rings [2]
257
/
10
•
condensed with carbocyclic rings or ring systems [2]
257
/
12
•
•
Six-membered rings having four nitrogen atoms [2]
259
/
00
Heterocyclic compounds containing rings having more than four nitrogen atoms as the only ring hetero atoms [2]
Heterocyclic compounds having nitrogen and oxygen as the only ring hetero atoms [2]
261
/
00
Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings [2]
261
/
02
•
not condensed with other rings [2]
261
/
04
•
•
having one double bond between ring members or between a ring member and a non-ring member [2]
261
/
06
•
•
having two or more double bonds between ring members or between ring members and non-ring members [2]
261
/
08
•
•
•
with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms [2]
261
/
10
•
•
•
with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms [2]
261
/
12
•
•
•
•
Oxygen atoms [2]
261
/
14
•
•
•
•
Nitrogen atoms [2]
261
/
16
•
•
•
•
•
Benzene-sulfonamido isoxazoles [2]
261
/
18
•
•
•
•
Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen [2]
261
/
20
•
condensed with carbocyclic rings or ring systems [2]
263
/
00
Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings [2]
263
/
02
•
not condensed with other rings [2]
263
/
04
•
•
having no double bonds between ring members or between ring members and non-ring members [2]
263
/
06
•
•
•
with hydrocarbon radicals, substituted by oxygen atoms, attached to ring carbon atoms [2]
263
/
08
•
•
having one double bond between ring members or between a ring member and a non-ring member [2]
263
/
10
•
•
•
with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms [2]
263
/
12
•
•
•
•
with radicals containing only hydrogen and carbon atoms [2]
263
/
14
•
•
•
•
with radicals substituted by oxygen atoms [2]
263
/
16
•
•
•
with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms [2]
263
/
18
•
•
•
•
Oxygen atoms [2]
263
/
20
•
•
•
•
•
attached in position 2 [2]
263
/
22
•
•
•
•
•
•
with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to other ring carbon atoms [2]
263
/
24
•
•
•
•
•
•
with hydrocarbon radicals, substituted by oxygen atoms, attached to other ring carbon atoms [2]
263
/
26
•
•
•
•
•
•
with hetero atoms or acyl radicals directly attached to the ring nitrogen atom [2]
263
/
28
•
•
•
•
Nitrogen atoms not forming part of a nitro radical [2]
263
/
30
•
•
having two or three double bonds between ring members or between ring members and non-ring members [2]
263
/
32
•
•
•
with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms [2]
263
/
34
•
•
•
with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms [2]
263
/
36
•
•
•
•
One oxygen atom [2]
263
/
38
•
•
•
•
•
attached in position 2 [2]
263
/
40
•
•
•
•
•
attached in position 4 [2]
263
/
42
•
•
•
•
•
attached in position 5 [2]
263
/
44
•
•
•
•
Two oxygen atoms [2]
263
/
46
•
•
•
•
Sulfur atoms [2]
263
/
48
•
•
•
•
Nitrogen atoms not forming part of a nitro radical [2]
263
/
50
•
•
•
•
•
Benzene-sulfonamido oxazoles [2]
263
/
52
•
condensed with carbocyclic rings or ring systems [2]
263
/
54
•
•
Benzoxazoles; Hydrogenated benzoxazoles [2]
263
/
56
•
•
•
with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached in position 2 [2]
263
/
57
•
•
•
•
Aryl or substituted aryl radicals [5]
263
/
58
•
•
•
with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2 [2]
263
/
60
•
•
Naphthoxazoles; Hydrogenated naphthoxazoles [2]
263
/
62
•
•
having two or more ring systems containing condensed 1,3-oxazole rings [2]
263
/
64
•
•
•
linked in positions 2 and 2' by chains containing six-membered aromatic rings or ring systems containing such rings [5]
