Table XIV.

¹H NMR Data of Tazettine-Type Alkaloids

Alkaloid	62	63	65	67
H-1	5.60 ddd	5.78 d	5.44 ddd	5.86 d
H-2	6.15 ddd	6.20 dd	5.97 d	6.13 d
H-3	4.13 m	3.89 ddd	4.12 m	4.3–4.4 m
H-4α	2.20 m	1.93 ddd	1.70 m	2.39 br d
H-4β	1.60 m	2.09 ddd	2.55 m	1.68 ddd
H-4a	2.83 m	2.95 t	3.10 m	3.15 br s
H-6	4.65 d	4.68 d	—	4.02 d
H-6′	4.95 dd	4.94 d	—	4.38 d
H-7	6.50 br s	6.55 s	7.52 s	6.66 s
H-10	6.85 s	6.52 s	6.73 s	6.70 s
H-10b	—	—	—	2.81 br d
H-11	—	—	4.43 dd	—
H-12	2.65 d	2.83 d	2.76 dd	3.01 d
H-12′	3.30 d	3.30 d	3.16 dd	3.10 d
OCH2O	5.90 s	5.92 s	6.01 s	5.99 s
OMe	3.45 s	3.45 s	3.40 s	—
NMe	2.40 s	2.38 s	2.50 s	—
Solvent	d	d	d	c
MHz	90	300	100	250
Reference	(347)	(355)	(337)	(76)

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