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4

• Four-membered rings‎ (4 C, 21 P)

5

• Five-membered rings‎ (31 C, 16 P)

6

• Six-membered rings‎ (23 C, 38 P)

9

• Nine-membered rings‎ (12 P)

A

• Antiaromatic compounds‎ (13 P)
• Aromatic compounds‎ (24 C, 48 P)

C

• Cyclic ethers‎ (10 C, 14 P)
• Cycloalkanes‎ (5 C, 16 P)
• Cycloalkenes‎ (5 C, 42 P)

H

• Heterocyclic compounds‎ (12 C, 14 P)

K

• Cyclic ketones‎ (2 C, 24 P)

M

• Macrocycles‎ (6 C, 80 P)

P

• Polycyclic organic compounds‎ (8 C, 3 P)

• Physics:Cyclic compound

C

• Chemistry:Cembratrienol
• Chemistry:Trans,trans,trans-(1,5,9-Cyclododecatriene)nickel(0)
• Chemistry:Cyclohexene oxide

D

• Chemistry:Diphenyl sulfide

M

• Chemistry:Metallabenzene

O

• Chemistry:Octaplane

Q

• Chemistry:Quinoid

R

• Chemistry:Radialene

T

• Chemistry:Trihydrogen cation