(3R,4S,5S,6S)-1-AZA-5-CARBOXYL-4-HYDROXY-6-ISOPROPYL-3-METHYL-7-OXABICYCLO[3.3.0]OCTAN-2-ONE
(3R,4S,5R,6S)-1-AZA-4-HYDROXY-5-HYDROXYMETHYL-6-ISOPROPYL-3-METHYL-7-OXABICYCL[3.3.0]OCTAN-2-ONE
CLASTO-LACTACYSTIN BETA-LACTONE
(3R,4S,5R)-4-HYDROXY-5-[(1S)-1-HYDROXY-2-METHYLPROPYL]-3-METHYL-2-PYRROLIDINONE-5-CARBOXYLIC ACID