¹H AND ¹³C NMR ASSIGNMENTS OF ISOQUINOLINE ALKALOIDS*

KITTISAK LIKHITWITAYAWUID,^a,b NIJSIRI RUANGRUNGSI,^b AND GEOFFREY A. CORDELL.^a,c

ABSTRACT: Use of two-dimensional NMR techniques, including the homonuclear COSY, NOESY, HETCOR and COLOC experiments, to unequivocally assign the ¹H and ¹³C NMR data of the isoquinoline alkaloids (-)-salutaridine, (-)-dicentrine and (-)-tetrahydropalmatine is demonstrated

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a Program for Collaborative Research in the Pharmaceutical Sciences, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of I1linois at Chicago, IL 60612, USA.
b Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand.
c Address for correspondence.
* Part XXVI in the series of "Traditional Medicinal Plants of Thailand." For Part XXV, see ref. 1.

Received April 3, 1993

1H AND 13C NMR ASSIGNMENTS OF ISOQUINOLINE ALKALOIDS*

KITTISAK LIKHITWITAYAWUID,a,b NIJSIRI RUANGRUNGSI,b AND GEOFFREY A. CORDELL.a,c

¹H AND ¹³C NMR ASSIGNMENTS OF ISOQUINOLINE ALKALOIDS*

KITTISAK LIKHITWITAYAWUID,^a,b NIJSIRI RUANGRUNGSI,^b AND GEOFFREY A. CORDELL.^a,c