直鎖状
| 組成式 | 示性式 | IUPAC | 慣用名 |
| CH3ON | HCONH2 | methanamide (メタンアミド) | formamide (ホルムアミド) |
| C2H5ON | CH3CONH2 |
ethanamide (エタンアミド) methane carbonamide (メタンカルボンアミド) | acetamide (アセトアミド) |
| C3H7ON |
C2H5CONH2 CH3CH2CONH2 |
propanamide (プロパンアミド) ethane carbonamide (エタンカルボンアミド) | propionamide (プロピオンアミド) |
| C4H9ON |
C3H7CONH2 CH3CH2CH2CONH2 |
butanamide (ブタンアミド) propane carbonamide (プロパンカルボンアミド) | n-butylamide (正ブチルアミド) |
| C5H11ON |
C4H9CONH2 CH3CH2CH2CH2CONH2 |
pentanamide (ペンタンアミド) butane carbonamide (ブタンカルボンアミド) | valeramide (バレルアミド) |