Table XXI.

¹³C NMR Data of Tazettine-Type Alkaloids

Alkaloid	62	63	65	67
C-1	130.5	130.1	131.3	132.4
C-2	128.4	128.9	126.0	136.5
C-3	72.4	72.1	72.7	63.6
C-4	26.6	25.4	29.8	34.4
C-4a	69.9	68.2	63.3	68.5
C-6	65.0	62.6	168.5	62.2
C-6a	127.8	126.2	118.6	131.0
C-7	103.7	108.5	103.8	107.3
C-8	146.3	146.6	147.1	148.4
C-9	146.3	146.2	152.3	147.3
C-10	109.1	104.2	111.0	111.0
C-10a	125.4	130.9	142.2	125.0
C-10b	50.1	50.0	46.2	50.3
C-11	101.7	102.6	80.1	82.7
C-12	61.7	64.5	53.5	55.7
OCH2O	100.6	100.9	102.1	101.9
OMe	55.6	56.7	56.2	—
NMe	41.9	40.6	42.8	—
Solvent	d	d	d	c
MHz	16	75	50	62
Ref.	(346)	(355)	(79)	(76)

Solvent a: DMSO-d₆, b: CDCl₃-CD₃OD, c; CD₃OD, d: CDCl₃.