Novel cholecystokinin antagonists from Aspergillus alliaceus. II. Structure determination of asperlicins B, C, D, and E.

Asperlicins B (1, C31H29N5O5), C (2, C25H18N4O2), D (3, C25H18N4O2), and E (4, C25H18N4O3) are novel cholecystokinin antagonists produced by Aspergillus alliaceus. The structures of these compounds have been determined by 1H NMR and MS analysis.