116
a 15,6-epoxy lactone (489), and three 10-OH lactones (391, 415, and 419) as well
as a 1,10-epoxide (466) were reported [193]. Although the authors indicated compound 391 as possessing a 6α-OH substituent, they cited an incorrect reference, and
there is no earlier publication describing this compound, while instead an 8α-H
derivative with a 6α-OH functionality has been found [295]. Thus, the structure
proposed for compound 391 should be checked carefully. Sample 8 produced
Fig. 41 Bakkane-type sesquiterpenoids
M. Tori and C. Kuroda
a 15,6-epoxy lactone (489), and three 10-OH lactones (391, 415, and 419) as well
as a 1,10-epoxide (466) were reported [193]. Although the authors indicated compound 391 as possessing a 6α-OH substituent, they cited an incorrect reference, and
there is no earlier publication describing this compound, while instead an 8α-H
derivative with a 6α-OH functionality has been found [295]. Thus, the structure
proposed for compound 391 should be checked carefully. Sample 8 produced
Fig. 41 Bakkane-type sesquiterpenoids
M. Tori and C. Kuroda