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. 2023 Aug 8;28(16):5946. doi: 10.3390/molecules28165946
IR, cm−1 1H-NMR, ppm 13C-NMR, ppm HPLC-MS m/z (%) Melting Temperature
Betulonic acid 1705 st (C=O)
1641 st (C=C)
883 st (=CH2)		 4.68 s (1H, 29-H),
4.55 s (1H, 29-H),
2.23 m (1H, 19-H),
1.65 s (3H, 30-CH3),
1.02–1.95 (3H, complex, CH2, CH),
1.02 s (3H, 26-CH3),
1.00 s (3H, 25-CH3),
0.98 s (3H, 27-CH3),
0.86 s (3H, 23-CH3),
0.85 s (3H, 24-CH3)		 216.52 (C-3),
109.67 (C-29)
150.33 (C-20),
177.26 (C-28).		 454 (M+,58),
248 (64),
19 (42),
205 (76),
189 (88),
136 (100),
121 (90).		 245–248 °C
Betulinic acid 3450 st (OH),
1683 st (C=O),
1641 st (C=C);
883 st (=CH2);
1031, 1042 st (α, β-3-C–OH).		 4.68 s (1H, 29-H),
4.55 s (1H, 29-H),
3.24 t (1 H, 3β-H),
2.99 dd (1H, 3α-H),
2.23 m (1H, 19-H),
1.65 s (3H, 30-CH3),
1.02–1.95 (3H, complex, CH2, CH),
1.02 s (3H, 26-CH3),
1.00 s (3H, 25-CH3),
0.98 s (3H, 27-CH3),
0.86 s (3H, 23-CH3),
0.85 s (3H, 24-CH3)		 76.83 (C-3),
109.67 (C-29),
150.33 (C-20),
177.26 (C-28)		 457 (M+, 7)
307 (25),
154 (100),
136 (60).		 290–293 °C
Betulonic aldehyde 1730–1728 st (C=O),
1641 st (C=C);
883 st (=CH2)		 9.67 s (1H, 28-CHO),
4.68 s (1H, 29-H),
4.55 s (1H, 29-H),
2.99 dd (1H, 3α-H),
2.23 m (1H, 19-H),
1.65 s (3H, 30-CH3),
1.02–1.95 (3H, complex, CH2, CH), 1.02 s (3H, 26-CH3),
1.00 s (3H, 25-CH3),
0.98 s (3H, 27-CH3),
0.86 s (3H, c, 23-CH3),
0.85 s (3H, c, 24-CH3)		 216.52 (C-3), 109.67 (C-29), 150.33 (C-20), 206.55 (C-28). 438 (11.5), [M-CHO]+ 409 (20.0), 273 (3.2),
219 (20.2),
205 (38.4),
189 (39.6),
133 (35.6),
105 (55.8),
81 (65),
55 (100).		 165–166 °C
Betulinaldehyde 0.75, (3H, c, 24-CH3)
0.82, (3H, c, 23-CH3),
0.95, (3H, 27-CH3),
0.97, (3H, 25-CH3),
1.03 (3H, 26-CH3),
1.70 (3H, 30-CH3),
4.81 (1H, 29-H),
4.61 (1H, 29-H),
3.4 dd(1H, 3α-H),
9.71 (1H, 28-CHO),		 149.6 (C-20),
110.1 (C-29),
79.0 (C-3)
206.5 (C-28)		 192–193 °C