2-oxaspiro[4.5]decan-3-one 7236-78-4 BUTANOIC ACID,4-HYDROXY,3,3-PENTAMETHYLENE,LACTONE BUTYROLACTONE,BETA,BETA-PENTAMETHYLENE InChI=1/C9H14O2/c10-8-6-9(7-11-8)4-2-1-3-5-9/h1-7H