title: Substituent induced chemical shifts for aromatic carbons in indole alkaloids.
authors.affiliation: Department of Pharmacognosy, State University of Leiden, P. O. Box 9502, 2300 RA Leiden, The Netherlands.
authors.forename: R
authors.initials: R
authors.lastname: Verpoorte
authors.forename: T A
authors.initials: TA
authors.lastname: van Beek
authors.forename: A B
authors.initials: AB
authors.lastname: Svendsen