Maytansine,N2'-deacetyl-N2'-(3-methyl-1-oxobutyl)-

Maytanvaline

美登缬氨酸酯

734.21

熔点175～6.5°,[α]26/D-135°(C=0.950,氯仿)。UV λEtOHmax nm(ε):233(29100),243(肩,26400),254(26800),281(5300),288(5360)。IR λKBrmaxμ:5.72,5.80,6.02,6.34,6.48,9.27。NMR(CDCl3)δ:0.81(3H,S,C-4CH3),0.92(3H,d,J=7,C-5'CH3),0.95(3H,d,J=7,C-5'CH3),1.29(3H,d,J=6,C-6CH3),1.32(3H,d,J=7,C-2'CH3),1.65(3H,s,C-14CH3),2.14(2H,d,J=7,C-4'H2),2.24(1H,dd,J2,2=14,J2,3=3,C-2H),2.68(1H,dd,J2,2=14,J2,3=11,C-2H),2.86(3H,s,C-2'NCH3),3.03(1H,d,J5,6=9,C-5H),3.12(1H,d,J15,15=13,C-15H),3.20(3H,s,C-1NCH3),3.35(3H,s,C-10OCH3),3.49(1H,d,J10,11=9,C-10H),3.52(1H,s,C-9OH),3.67(1H,d,J15,15=13,C-15H),3.98(3H,s,C-20OCH3),4.30(1H,m,C-7H),4.78(1H,dd,J2,3=11,3,C-3H),5.34(1H,q,J=7.C-2'H),5.66(1H,dd,J10,11=9,J11,12=15,C-11H),6.24(1H,S,C-9NH),6.48(1H,dd,J11,12=15,J12,13=10,C-12H),6.71(1H,d,J12,13=10,C-13H),6.70,6.83(2H,2d,J17,21=1.5,C-17H,C-21H),1.0～2.0(4H,C-6H,C-8H2,C-5'H)。

有抗癌作用,对小鼠淋巴白血病P388和鼻咽癌KB细胞有很强的活性。在最佳剂12.5mg/kg时,P388小鼠的生命延长率为87%;对KB细胞培养的细胞毒活性ED50为0.00000023μg/ml。

卫矛科植物山檨美登木 Maytenus buchananii(Loes.)R.Wilczek.茎。

1.《植物药有效成分手册》人民卫生出版社1986

C37H52ClN3O10