New cyclic sulfides extracted from Allium sativum : garlicnins P, J 2 , and Q

Two atypical cyclic-type sulfides, garlicnin P ( 1 ) and garlicnin J 2 ( 2 ), and one thiabicyclic-type sulfide, garlicnin Q ( 3 ), were isolated from the acetone extracts of garlic, Allium sativum , bulbs cultivated in the Kumamoto city area, and their structures characterized. Their production pathways are also discussed.