Table 1.

¹H (500 MHz) and ¹³C (125 MHz) NMR data of 1 in DMSO-d₆

no.	δ (ppm), type	δ H (ppm) (mult, J (Hz))	1H-1H COSY	1H-13C HMBC
A1	100.2, CH	4.62, d (1.3)	A2	A2, A5, B3
A2	71.2, CH	3.53, m	A1, A2, A2-OH	A3, A4
A2-OH		4.65, d (5.6)	A2	A3
A3	71.0, CH	3.35, m	A2, A4, A3-OH
A3-OH		4.48, d (6.1)	A3	A2
A4	72.3, CH	3.15, m	A3, A5, A4-OH
A4-OH		4.69, d (4.8)	A4	A4
A5	69.2, CH	3.44, m	A4, A6	A3, A4,
A6	18.2, CH3	1.08, d (6.2)	A5	A5
B1	170.3, qC
B2	39.0, CH2	2.41, dd (14.0, 7.5), 2.46	B3	B1, B3
B3	74.3, CH	3.85, m	B2, B4	A1, B1, B4
B4	33.8, CH2	1.43, m	B3
B5-B9	22.5–31.6, CH2	1.19–1.27, m
B10	14.5, CH3	0.84, m
C1	169.4, qC
C2	40.6, CH2	2.45, m, 2.53, m	C3	C1, C3
C3	70.3, CH	5.04, m	C2, C4	B1
C4	33.5, CH2	1.52, m	C3
C5-C9	22.5–31.6, CH2	1.18–1,25, m
C10	14.5, CH3	0.84, m
D1	168.7, qC
D2	40.4, CH2	2.29, dd (14.0, 5.5), 2.33. dd (14.0, 7.9)	D3	D1, D3
D3	71.8, CH	5.08, m	D2, D4	C1
D4	33.5, CH2	1.46, m	D3
D5-D9	22.5–31.6, CH2	1.17–1.24, m
D10	14.5, CH3	0.84, m
E1	64.2, CH2	3.16, m, 3.27, m	E1-OH
E1-OH		4.56, t (5.5)	E1	E1, E2
E2	49.0, CH	3.76, m	E2-NH
E2-NH		7.54, d (8.7)	E2	E2
E3	40.3, CH2	1.23, m
E4	24.7, CH	1.53, m
E5	22.2, CH3	0.79, d (6.5)	E4	E4
E5′	23.8, CH3	0.84, d	E4	E4