31. The hCPT s hydroxyl has less inductive effect on the carboxyl group which makes the lactone very reactive. 32. It was discovered several years later by Guth in white wines and was named " wine lactone ". 33. It acts in a similar way as a typical lipase inhibitor that has the ?-lactone structure. 34. It is also used in the preparation of cyclopentanone, diacetone alcohol and D-Gulonic ?-lactone . 35. Based on deuterium tracking studies, the biosynthetic pathway for aubucin from the cyclized lactone intermediate is organism specific. 36. It is the smallest member of the lactone family but can also be described as the epoxide of ketene. 37. It is a sesquiterpene lactone with a germacranolide skeleton, containing two lactone rings and an epoxide functional group. 38. It is a sesquiterpene lactone with a germacranolide skeleton, containing two lactone rings and an epoxide functional group. 39. Would a catalyst like TEMPO be worth it ? ( ultimately the end product is gamma-lactone ). 40. The last synthetic step leading to the generation of dioscorine is the reaction of an iminium ion with lactone .