Table 4.

Experimental and Calculated ¹³C NMR Data for Compounds 2, 3a, and 3b

no.	2			3	3a		3b
	exptl	calcd	error	exptl	calcd	error	calcd	error
1				130.0	131.0	1.0	131.7	1.7
2	87.6	90.2	2.6	105.9	112.4	6.5	106.6	0.7
3				148.0	148.6	0.6	148.5	0.5
4	44.3	45.9	1.6	134.2	139.3	5.1	137.3	3.1
5	31.8	32.4	0.6	148.0	148.5	0.5	147.8	−0.2
6	84.5	88.6	4.1	105.9	102.9	−3.0	101.8	−4.1
7	124.9	121.9	−3.0	31.9	36.4	4.5	40.4	8.5
8	124.5	122.2	−2.3	139.4	145.2	5.8	159.8	20.4
9	108.8	109.7	0.9
10	160.5	161.8	1.3	153.1	155.3	2.2	155.2	2.1
11	102.6	100.5	−2.1
12	143.7	146.0	2.3	140.5	140.8	0.3	117.2	−23.3
13	154.0	154.0	0
14	153.5	152.5	−1.0
2-CH3	20.0	21.9	1.9
3-OCH3/10-OCH3	55.2	53.0	−2.2	56.0	53.7	−2.3	53.8	−2.2
5-OCH3/13-OCH3	52.2	51.0	−1.2	56.0	56.2	0.2	54.3	−1.7
15-OCH3	51.9	51.3	−0.6