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| Year of first report: | 1970 |
| Formula: | C29H44O8 |
| Molecular weight: | 520 |
| Occurence in plants: |
Cyathula capitata [Amaranthaceae] »  ![Wikipedia: <br />
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| Occurence in animals: |
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| CI-MS (NH3) m/z | | | EI-MS m/z (relative intensity %) | 502 (M-18)+, 363, 345, 327, 157, 139, 121 | | HR-MS | |
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| C5D5N | | 01 | | | 02 | | | 03 | | | 04 | | | 05 | | | 06 | | | 07 | | | 08 | | | 09 | | | 10 | | | 11 | | | 12 | | | 13 | | | 14 | | | 15 | | | 16 | | | 17 | | | 18 | | | 19 | | | 20 | | | 21 | | | 22 | | | 23 | | | 24 | | | 25 | | | 26 | | | 27 | | | 28 | | | 29 | |
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| CDCl3 (tri0Ac) | | 01-Ha | | | 02-Ha | 5.01 (ddd ) | | 03-He | 5.33 (ddd ) | | 04-Ha | | | 04-He | | | 05-H | | | 07-H | 5.88 (d ) | | 09-Ha | 3.12 (ddd ) | | 11-Ha | | | 11-He | | | 12-Ha | | | 12-He | | | 15-Ha | | | 15-Hb | | | 16-Ha | | | 16-Hb | | | 17-H | | | 18-Me | 0.87 (s ) | | 19-Me | 1,03 (s ) | | 21-Me | 1.24 (s ) | | 22-H | 4.18 (dd ) | | 23-Ha | | | 24-Ha | | | 24-Hb | | | 26-Me | -- | | 27-Me | 1.28 (d ) | | 28-H | 5.11 (dq ) | | 29-Me | 1.27 (d ) |
| C5D5N (free form) | | 01-Ha | | | 02-Ha | | | 03-He | | | 04-Ha | | | 04-He | | | 05-H | | | 07-H | 6.16 (d ) | | 09-Ha | | | 11-Ha | | | 11-He | | | 12-Ha | | | 12-He | | | 15-Ha | | | 15-Hb | | | 16-Ha | | | 16-Hb | | | 17-H | | | 18-Me | 1.11 (s ) | | 19-Me | 1.05 (s ) | | 21-Me | 1.44 (s ) | | 22-H | | | 23-Ha | | | 24-Ha | | | 24-Hb | | | 26-Me | -- | | 27-Me | 1.35 (d ) | | 28-H | | | 29-Me | 1.24 (d ) |
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| M.P. | | | [α]D20 | +39 ° (c ; MeOH) | | IR (KBr) ν max (cm-1) | 1710 (?-lactone), 1650 (cyclohexenone) | | UV (EtOH) λ max (log ε) | 244 (?) |
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Permanent link to this datasheet: PRECYASTERONE
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