1. 1) Zhong Shan Medical College, Clinical Application of Chinese Medicine, Guang Dong People’s Publisher, p. 136 (1975).
2. 8) Dehydrotrametenonic Acid (1). colorless needles from MeOH, mp 233–235°C. [α]D25+14.8° (c0.35, CHCl3). UV λmax(EtOH) nm: 236, 243, 252. IR νmax(KBr) cm−1: 1713, 1698, 1656, 813.13C- and1H-NMR, see Table 1. EIMSm⁄z: 452 (M+) (100), 437 (24), 434 (9), 370 (11), 311 (27), 309 (40), 270 (32), 269 (38), 257 (14), 255 (12), 244 (20), 229 (8), 69 (25). HREIMSm⁄z(M+): Calcd. for C30H44O3: 452.3287, Found: 452.3290.
3. 9) Dehydroeburiconic acid (2). colorless needles from MeOH, mp 237–239°C;1H-NMR δH(C5D5N): 1.00 (3H, s, H-18), 1.03 (3H, s, H-30), 1.03 and 1.04 (both 3H, two d, bothJ=7.0 Hz, H-26 and H-27), 1.07 (3H, s, H-29), 1.13 (3H, s, H-19), 1.14 (3H, s, H-28), 4.90 and 4.94 (both 1H, two s, H-241), 5.34 (1H, br s, H-11), 5.58 (1H, br d,J=5.9 Hz, H-7). EIMSm⁄z: 466 (M+) (100), 451 (22), 439 (7), 423 (9), 370 (8), 309 (68), 295 (28), 270 (24), 269 (37), 257 (16), 255 (12), 244 (12), 229 (9).
4. 11) Goad, L. J., and Akihisa, T. “Analysis of Sterols”, Blackie Academic & Professional, London, pp. 152–196 (1997).
5. 12) Tai, T. “On the Constituents ofPoria cocosWOLF”, Dissertation, Kobe-Gakuin University, Kobe, p. 86 (1996).