Barbituric acids; Derivatives thereof, e.g. sodium pentobarbital [2]
31
/
52
•
•
•
•
•
Purines; Xanthines, e.g. caffeine, theophylline [2]
31
/
525
•
•
•
•
•
Isoalloxazines, e.g. riboflavins, vitamin B2 [2]
31
/
53
•
•
•
having six-membered rings with three nitrogens as the only ring hetero atoms [2]
31
/
535
•
•
•
having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms [2]
31
/
54
•
•
•
having six-membered rings with at least one nitrogen and one sulfur as the ring hetero atoms [2]
31
/
545
•
•
•
•
Compounds containing 5-thia-1-azabicyclo [4.2.0] octane ring systems, i.e. compounds containing a ring system of the formula, , e.g. cephalosporins [2,6]
31
/
55
•
•
•
having seven-membered rings [2]
31
/
555
•
•
containing heavy metals [2]
31
/
557
•
Prostaglandins or analogues thereof, e.g. carbocyclins, prostacyclins, heteroprostaglandins [3]
31
/
56
•
Compounds containing cyclopenta[a]hydrophenanthrene ring systems, including ring-modified steroids, e.g. lanolin, nor- or homo-steroids [4]
31
/
565
•
•
not substituted in position 17 beta by a carbon atom, e.g. estrane, androstane [2]
31
/
57
•
•
substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane [2]
31
/
575
•
•
substituted in position 17 beta by a chain of three or more carbon atoms, e.g. cholane, cholestane [2]
31
/
58
•
•
containing heterocyclic rings [2]
31
/
585
•
•
•
containing lactone rings [2]
31
/
59
•
Compounds containing 9,10-seco-cyclopenta[a]hydro- phenanthrene ring systems, e.g. vitamin D2, "activated ergosterol", ergocalciferol, cholecalciferol, antirachitic vitamin [2]
31
/
595
•
•
with vitamin A compound (fish liver extract A 61 K 35/60) [2]
31
/
60
•
Salicylic acid; Derivatives thereof, e.g. aspirin [2]
31
/
605
•
•
with additional oxy compounds [2]
31
/
61
•
•
with additional carboxylic acids, or esters or metal salts thereof [2]
31
/
615
•
•
with additional amines or amides [2]
31
/
62
•
•
with additional heterocyclic compounds [2]
31
/
625
•
•
having heterocyclic substituents [2]
31
/
63
•
Compounds containing para-N-benzene- sulfonyl-N-groups, e.g. sulfanilamide p-nitrobenzene-sulfonyl-hydrazone [2]
31
/
635
•
•
having a heterocyclic ring [2]
31
/
64
•
Sulfonylureas [2]
31
/
645
•
Compounds containing a ring system of three fused rings, having an amino or amino-alkylene radical attached to the central ring [2]
31
/
65
•
Tetracyclines [2]
31
/
655
•
Azo, diazo, azoxy, azido or diazoamino compounds [2]
31
/
66
•
Phosphorus compounds [2]
31
/
665
•
•
having oxygen as a ring hetero atom [2]
31
/
67
•
•
having sulfur as a ring hetero atom [2]
31
/
675
•
•
having nitrogen as a ring hetero atom [2]
31
/
68
•
•
•
Cobalamins, e.g. vitamin B12, cyanocobalamin [2]
31
/
685
•
•
Amine salts of phosphorus acids, e.g. lecithin [2]
31
/
69
•
Boron compounds [2]
31
/
695
•
Silicon compounds [2]
31
/
70
•
Carbohydrates; Derivatives thereof (A 61 K 31/68 takes precedence) [2]
31
/
705
•
•
Compounds containing cyclopenta[a]hydro- phenanthrene ring systems including ring-modified steroids, e.g. digitalis [4]
31
/
71
•
•
Fermentates, e.g. streptomycin; Such compounds synthetically prepared; Derivatives thereof [2]
31
/
715
•
•
Polysaccharides [2]
31
/
72
•
•
•
Ethers; Esters [2]
31
/
725
•
•
•
containing acid groups, e.g. heparin, agar-agar, pectin [2]
31
/
73
•
•
•
containing amino groups (A 61 K 31/725 takes precedence) [4]
, e.g. cephalosporins [2,6]