... ent, ph bi n phyllocladan có c u metylen metyl v trí đ i di n so v i nhóm C -10 20 11 12 10 H 13 20 16 14 11 17 10 15 H 19 H 13 17 16 14 15 H 19 18 ent-kauran 12 18 phyllocladan 1.3 .1 Sinh t ng h ... α-OCH3 H =O β-CH3 14 8 α-OCH3 H =O α-CH3 14 9 β-OCH3 H =O α-CH3 15 0 β-OCH3 H =O β-CH3 15 1 α-OCH3 H =O =CH2 15 2 =O OH α -OH =CH2 16 18 R1 13 11 o r3 29 15 3 =O =O β-CH3 15 4 =O OH =O β-CH3 15 5 β-OCH3 ... t bào K562 [38 ] r2 r 20 11 10 h 18 19 R4 R5 17 13 9 OH OAc OH H =O 14 0 OAc H OH H =O 14 3 OAc H OH H β-OH r4 o R3 16 14 15 R2 13 h R1 r3 12 oh r5 28 14 4 OAc H H OH β-OH 1 45 OAc H H OH =O 14 6 OH...