| Sterol |
| LIPID_ID | ST0332 |
| CHEM_NA | 2,16,20,24,25-PENTAHYDROXY-9-METHYL-19-NOR |
| LANOSTA-1,5-DIENE-3,11,22-TRIONE |
| COMMON_NA | CUCURBITACIN K |
| MOL_FORMULA | C30H44O8 |
| MOL_WT | 532 |
| MELT_PT | INDEFINE(721),137-141ﾟC(714) |
| BOIL_PT |
| OPT_ROT | [α]/D=-74ﾟ(C=1.0 in CHLOROFORM)(721) |
| REFRA_IND |
| DENSITY |
| SOLUBILITY |
| UV_SPEC | λmax,270mμ(ε=8,000 in ETHANOL),312 |
| mμ(ε=5,900 in 0.1N KOH in 50%ETHANOL)(721), |
| λmax,269mμ(Ε1%/1cm 148)in neutral |
| solution,314mμ(Ε1%/1cm 104)in alkaline |
| IR_SPEC | νmax : 1695, 1664cm-1(721) |
| NMR_SPEC |
| MS_SPEC |
| NOTE_SPEC |
| SOURCE | 植物｡ |
| ・Citrullus ecirrhosus Sond.(Colocynthis ecirrhosus |
| Chakrav.), Cucurbitaceae の CRUDE FOAMS |
| の酵素加水分解物から単離｡ (714) |
| ・IBERIS AMARA,CRUCIFERAE｡ (721) |
| BIOL_ACTIV | ・苦味成分｡ (714) |
| NOTE | 分子量 532.322, |
| Cucurbitacin J と K は, 互いに hydroxyl |
| groupの原子配列が, 24の位置でのみ異なる｡ (721) |
| 1998年7月17日 | 411 / 486 ページ |