| Member | Definition | Role |
|---|
| ertapenem | Meropenem in which the one of the two methyl groups attached to the amide nitrogen is replaced by hydrogen while the other is replaced by a 3-carboxyphenyl group. The sodium salt is used for the treatment of moderate to severe susceptible infections including intra-abdominal and acute gynaecological infections, pneumonia, and infections of the skin and of the urinary tract. | ertapenem |
| meropenem | A carbapenemcarboxylic acid in which the azetidine and pyrroline rings carry 1-hydroxymethyl and in which the azetidine and pyrroline rings carry 1-hydroxymethyl and 5-(dimethylcarbamoyl)pyrrolidin-3-ylthio substituents respectively. | meropenem |
| sq 27860 | A carbapenemcarboxylic acid that is the 3-carboxy derivative of 2,3-didehydro-1-carbapenam. | 1-carbapenem-3-carboxylic acid |