| formaldehyde | fomanđehit | methanal | oxymethylene |
| methylene oxide | methyl aldehyde | formic aldehyde | carbaldehyde |
| hydroxymethanal | formic acid | acetaldehyde | butyraldehyde |
| propionaldehyde | isobutyraldehyde | valeraldehyde | crotonaldehyde |
| benzaldehyde | salicylaldehyde | cinnamaldehyde | paraldehyde |