中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 13-oxopodocarp-8(14)-en-19-oic acid | 135414-08-3 | C17H24O3 | 276.376 |
—— | agathic acid 15,19-dimethyl ester | 1757-85-3 | C22H34O4 | 362.51 |
—— | methyl 8,13-dioxo-14,15,17-trinorlabdan-19-oate | 23963-09-9 | C18H28O4 | 308.418 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | methyl (-)-13-formylpodocarp-13-en-19-oate | 135322-52-0 | C19H28O3 | 304.43 |
—— | 4-epi-Abietic acid methyl ester | 24563-92-6 | C21H32O2 | 316.484 |
—— | methyl (+)-16-hydroxy-5α,14β-cleistanth-13(17)-en-19-oate | 135500-20-8 | C21H34O3 | 334.499 |
—— | methyl (+)-13-hydroxymethylpodocarp-13-en-19-oate | 135322-53-1 | C19H30O3 | 306.445 |
—— | methyl 16-oxo-5α,14α-cleistanth-13(17)-en-19-oate | 135500-16-2 | C21H32O3 | 332.483 |
—— | methyl (+)-16-oxo-5α,14β-cleistanth-13(17)-en-19-oate | 135500-15-1 | C21H32O3 | 332.483 |
—— | (-)-methyl auricularate | 135638-50-5 | C21H32O2 | 316.484 |
1-菲羧酸,8-乙烯基十四氢-1,4a-二甲基-7-亚甲基-,(1S,4aR,4bS,8R,8aR,10aR)- | (-)-auricularic acid | 112515-73-8 | C20H30O2 | 302.457 |
The action of nitrous acid on azomethines derived from the alkaloid atisine gave a good yield of nitrogen-free hemiacetal, thus providing the first means of removing the nitrogen from the diterpenoid alkaloids. Transformation products of the hemiacetal, including the most hindered carboxylic acid hitherto known, are described. The internal oxidation–reduction reactions encountered in this and related work are discussed.