Preparation and Characterization of Urushiol Methylene Acetal Derivatives with Various Degrees of Unsaturation in Alkyl Side Chain

Table 1

¹³C NMR spectral data of compounds 1, 2, 3, and 4 in pyridine-d₅ ( ppm).

Carbon	1	2	3	4
1	146.5	146.9	146.8	146.9
2	145.3	145.4	145.5	145.4
3	124.4	129.5	129.4	129.4
4	122.5	124.4	124.5	124.5
5	121.2	122.2	122.5	122.2
6	116.2	116.5	116.2	116.5
1′	29.7	29.8	29.7	29.8
2′	29.6	29.7	29.6	29.7
3′	29.6	29.6	29.6	29.6
4′	29.6	29.5	29.6	29.6
5′	29.5	29.5	29.5	29.5
6′	29.4	29.4	29.4	29.4
7′	29.3	27.4	27.3	27.3
8′	29.3	130.2	130.4	130.5
9′	29.3	130.4	128.6	127.7
10′	29.4	27.6	26.4	25.8
11′	29.3	29.3	128.5	127.5
12′	29.5	29.5	130.6	129.8
13′	31.9	31.9	27.9	26.7
14′	22.6	22.6	22.6	114.8
15′	14.1	14.1	13.9	136.9
-O-CH2-O-	76.5	77.0	77.2	77.4