1. CH 3 18.1, CH 3 18.1, CH 3 18.1, CH3 18.1, CH3 6? 26.1, CH 3 26.1, CH 3 25;CH
2. mg, t R = 25 min) and 2b (5.7 mg, t R = 27 min). Fr. D.3 was separated on Sephadex LH-20 column chromatography (CH 2 Cl 2 -MeOH, 1:1, v/v) and semipreparative HPLC (ACN-H 2 O, 76:24, 3 mL/min) to afford a mixture D.3-1. The mixture D.3-1 was further purified by HPLC (n-Hexane-2-Propanol;Hplc (n-Hexane-2-Propanol;mL/min) using a Chiralpak IE column to provide compounds 3b (3.3 mg, t R = 19 min), 3a (1.9 mg, t R = 22 min) and 4 (2.7 mg, t R = 25 min). Fr. D.4 was separated on Sephadex LH-20 column chromatography (CH 2 Cl 2 -MeOH, 1:1, v/v) and semipreparative HPLC