An oxaspiro compound in which a carbon atom of an epoxide ring is the only common member of two rings.
| Member | Definition | Role |
|---|
| arenaemycin e | A sesquiterpene lactone that is isolated from several Streptomyces species and exhibits antibiotic activity. | pentalenolactone |
| fr 901464 | A spiro-epoxide with potent anticancer activity that lowers the mRNA levels of oncogenes and tumour supressor genes. It is isolated from Pseudomonas sp. no.2663. | FR901464 |
| 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 |
| fumagillol | A sesquiterpenoid with antimicrobial properties. | fumagillol |
| o-(chloroacetylcarbamoyl)fumagillol | A carbamate ester that is fumagillol in which the hydroxy group has been converted to the corresponding N-(chloroacetyl)carbamate derivative. | O-(chloroacetylcarbamoyl)fumagillol |
| pentalenolactone f | A tetracyclic sesquiterpene lactone obtained by formal epoxidation of the 4-methylene group of pentalenolactone E. | pentalenolactone F |
| petasitenine | | Petasitenine |
| streptolydigin | A monocarboxylic acid amide that is a broad-spectrum antibiotic produced by Streptomyces lydicus. | streptolydigin |