| Member | Definition | Role |
|---|
| adefovir | A dimeric naphthopyran with formula C32H26O10, originally isolated from Aspergillus niger. | aurasperone A |
| cycloserine | A 4-amino-1,2-oxazolidin-3-one that has R configuration. It is an antibiotic produced by Streptomyces garyphalus or S. orchidaceus and is used as part of a multi-drug regimen for the treatment of tuberculosis when resistance to, or toxicity from, primary drugs has developed. An analogue of D-alanine, it interferes with bacterial cell wall synthesis in the cytoplasm by competitive inhibition of L-alanine racemase (which forms D-alanine from L-alanine) and D-alanine--D-alanine ligase (which incorporates D-alanine into the pentapeptide required for peptidoglycan formation and bacterial cell wall synthesis). | D-cycloserine zwitterion; D-cycloserine |
| fumagillin | A meroterpenoid resulting from the formal condensation of the hydroxy group of fumagillol with the carboxylic acid group of (all-E)-deca-2,4,6,8-tetraenedioic acid. Originally isolated from the fungus Aspergillus fumigatus, it is used for the control of Nosema infection in honey bees. | fumagillin |
| nanaomycin a | A pyranonaphthoquinone antibiotic from strain OS-3966 of Streptomyces rosa var. notoensis. | nanaomycin A |
| nitrofurantoin | An imidazolidine-2,4-dione that is hydantoin substituted at position 1 by a [(5-nitro-2-furyl)methylene]amino group. An antibiotic that damages bacterial DNA. | nitrofurantoin |