Table 1.

NMR spectroscopicdata for Sarcrocrassocolides M–O(1–3).

Sarcrocrassocolide P (1)			Sarcrocrassocolide Q (2)		Sarcrocrassocolide R (3)
position	δC, mult. a	δH (J in Hz) b	δC, mult. a	δH (J in Hz) b	δC, mult. c	δH (J in Hz) d
1	38.5, CH	3.11, brd (9.5) c	37.7, CH	3.06, brs	40.5, CH	3.02, d (11.0)
2	37.3, CH2	1.80, m	35.7, CH2	2.05, t (5.0)	39.3, CH2	2.14, m
		1.32, ddd (14.5, 10.5, 9.5)		1.80, m		1.82, ddd (19.0, 5.5, 1.5)
3	73.1, CH	3.73, t (10.0)	75.8, CH	5.04, dd (6.5, 5.0)	71.6, CH	4.25, d (5.0)
4	89.9, C		74.7, C		150.5, C
5	36.4, CH2	1.94, t (11.5)	37.9, CH2	1.68, m	31.2, CH2	2.16, m
		1.81, m				2.12, m
6	23.1, CH2	2.26, m	23.1, CH2	2.18, m	23.4, CH2	2.59, m
		2.15, m				2.21, m
7	125.7, CH	5.08, t (7.0)	123.3, CH	5.13, t (7.0)	126.3, CH	5.07, d (10.5)
8	135.8, C		136.5, C		133.9, C
9	39.4, CH2	2.28, m	37.6, CH2	2.21, m	36.7, CH2	2.29, d (13.0)
		2.09, m				2.09, m
10	24.7, CH2	2.44, qd (10.0, 2.5)	24.6, CH2	2.34, m	24.4, CH2	2.17, m
		2.11, m		2.24, m		1.31, m
11	127.3, CH	5.32, dd (10.0, 3.5)	129.3, CH	5.32, brt (7.0)	61.7, CH	2.56, dd (11.0, 4.0)
12	130.3, C		129.2, C		59.7, C
13	77.5, CH	5.40, s	76.5, CH	5.37, s	46.5, CH2	2.00, dd (14.0, 11.5)
						1.24, d (14.0)
14	79.1, CH	5.28, brs	82.7, CH	4.43, dd (5.0, 2.0)	81.1, CH	4.32, d (11.5)
15	140.5, C		140.5, C		139.5, C
16	170.1, C		169.8, C		170.1, C
17	120.9, CH2	6.24, d (2.0)	122.2, CH2	6.23, d (2.5)	123.2, CH2	6.29, d (1.5)
		5.65, d (2.0)		5.78, d (2.5)		5.69, d (1.5)
18	19.7, CH3	1.44, s	24.4, CH3	1.44, s	107.3, CH2	5.17, s
						4.78, s
19	16.0, CH3	1.67, s	16.8, CH3	1.65, s	14.9, CH3	1.76, s
20	14.5, CH3	1.72, s	14.6, CH3	1.72, s	17.5, CH3	1.38, s
4-OAc	22.1, CH3	2.04, s
	172.1, C
3-OAc			21.2, CH3	2.08, s
			170.4, C
13-OAc	20.8, CH3	1.99, s	20.8, CH3	2.03, s
	169.3, C		169.5, C

^a Spectra recorded at 125 MHz in CDCl₃; ^b Spectra recorded at 500 MHz in CDCl₃; ^c Spectra recorded at 100 MHz in CDCl₃; ^d Spectra recorded at 400 MHz in CDCl₃.