Two new cadinane sesquiterpenes and one new lignan from Abelmoschus moschatus subsp. tuberosus and their α-glucosidase inhibitory activity

Two new cadinane sesquiterpenes, cadinoschanes A and B (1 and 2), one new norlignan, lignanoschane A (6) along with seven known compounds, hibiscone B (3), 7β-O-β-glucopyranosyl bombaxone (4), 2,7β,8β-trihydroxy trans-calamenene 7-O-β-D-glucopyranoside (5), clemastanin A (7), (−)-3,4,3′,4′-tetrahydroxy-9,7′β-epoxylignano-7β,9′-lactone (8), N-trans-feruloyl tyramine (9), and methyl (3R)-3-[(3R)-3-{(3R)-3-hydroxybutanoyloxy} butanoyloxy} butanoate...