Study of Catalytic Hydrogenation and Methanol Addition to α-Methylene-γ-Lactone of Eremanthine Derivatives

Table 2

Selected chemical shifts for the hydrogens of isomers 34 and 35.

Hydrogens	δ (multiplicity, 𝐽/Hz)
	Isomer 34	Isomer 35
H-6	4.02 (t, 10.2)	3.96 (dd, 9.8, 10.7)
Ha-13	6.13 (d, 3.5)	6.27 (d, 3.4)
Hb-13	5.41 (d, 3.2)	5.52 (d, 3.1)
H-14	0.96 (d, 7.2)	1.04 (d, 6.6)
H-15	1.34 (s)	1.36 (s)