New Alkaloids, Picrasidines W, X and Y, from Picrasma quassioides and X-Ray Crystallographic Analysis of Picrasidine Q.

New Alkaloids, Picrasidines W, X and Y, from Picrasma quassioides and X-Ray Crystallographic Analysis of Picrasidine Q. New Alkaloids, Picrasidines W, X and Y, from Picrasma quassioides and X-Ray Crystallographic Analysis of Picrasidine Q. Studies on the alkaloids from Picrasma quassioides Bennet. VI. Structures of picrasidines N, O, and Q. Studies on the alkaloids from Picrasma quassioides Bennet. VI. Structures of picrasidines N, O, and Q. Studies on the alkaloids from Picrasma quassioides Bennet. IV. Structures of picrasidines I, J, and K. Studies on the alkaloids from Picrasma quassioides Bennet. IV. Structures of picrasidines I, J, and K. Studies on the constituents of Picrasma quassioides BENNET. III. The alkaloidal constituents. Studies on the alkaloids from Picrasma quassioides BENNET. V. Structures of picrasidines L,M, and P. Studies on the constituents of Picrasma quassioides BENNET. III. The alkaloidal constituents. Studies on the alkaloids from Picrasma quassioides BENNET. IX. Structures of two .BETA.-carboline dimeric alkaloids, picrasidines-G and -S.