松胞菌素B，针状结晶。通常情况下稳定。不溶于水。熔点218～221℃。有毒。本品应密封于0℃以下干燥保存。

中文名称:松胞菌素B

中文别名:细胞松弛素B

英文名称:Cytochalasin B

英文别名:(E,E)-(5S,9R,12aS,13S,15S,15aS,16S,18aS)-16-Benzyl-6,7,8,9,10,12a,13,14,15,15a,16,17-dodecahydro-5,13-dihydroxy-9,15-dimethyl-14-methylene-2H-oxacyclotetradec(2,3-d)isoindole-2,18(5H)-dione; 24-Oxa(14)cytochalasa-6(12),13,21-triene-1,23-dione, 7,20-dihydroxy-16-methyl-10-phenyl-, (7S,13E,16R,20R,21E)-; 2H-Oxacyclotetradec(2,3-d)isoindole-2,18(5H)-dione, 16-benzyl-6,7,8,9,10,12a,13,14,15,15a,16,17-dodecahydro-5,13-dihydroxy-9,15-dimethyl-14-methylene-, (E,E)-(5S,9R,12aS,13S,15S,15aS,16S,18aS)-; 7,20-Dihydroxy-10-phenyl-5,16-dimethyl-24-oxa-(14)cytochalas-6(12),13,21-trien-23-one; BRN 1096207; CCRIS 9284; HSDB 3479; Phomin; 2H-Oxacyclotetradec(2,3-d)isoindole-2,18(5H)-dione, 16-benzyl-6,7,8,9,10,12a,13,14,15,15a,16,17-dodecahydro-5,13-dihydroxy-9,15-dimethyl-14-methylene-, (E)-(5S,9R,12aS,13S,15S,15aS,16aS,18aS)-; 2H-Oxacyclotetradecino(2,3-d)isoindole-2,18(5H)-dione, 16-benzyl-6,7,8,9,10,12a,13,14,15,15a,16,17-dodecahydro-5,13-dihydroxy-9,15-dimethyl-14-methylene-, (E,E)-(5S,9R,12aS,13S,15S,15aS,16S,18aS)-; 2H-Oxacyclotetradecino(2,3-d)isoindole-2,18(5H)-dione, 6,7,8,9,10,12a,13,14,15,15a,16,17-dodecahydro-5,13-dihydroxy-9,15-dimethyl-14-methylene-16-(phenylmethyl)-, (3E,5R,9R,11E,12aS,13S,15S,15aS,16S,18aS)-; 7(S),20(R)-Dihydroxy-16(R)-methyl-10-phenyl-24-oxa(14)cytochalasa-6(12),13(E),21(E)-triene-1,23-dione; 16-benzyl-5,13-dihydroxy-9,15-dimethyl-14-methylidene-6,7,8,9,10,12a,13,14,15,15a,16,17-dodecahydro-2H-oxacyclotetradecino[2,3-d]isoindole-2,18(5H)-dione; (3E,5R,9R,11E,12aS,13S,15S,15aS,16S,18aS)-16-benzyl-5,13-dihydroxy-9,15-dimethyl-14-methylidene-6,7,8,9,10,12a,13,14,15,15a,16,17-dodecahydro-2H-oxacyclotetradecino[2,3-d]isoindole-2,18(5H)-dione; (3E,5S,9R,11E,12aS,13S,15S,15aS,16S,18aS)-16-benzyl-5,13-dihydroxy-9,15-dimethyl-14-methylidene-6,7,8,9,10,12a,13,14,15,15a,16,17-dodecahydro-2H-oxacyclotetradecino[2,3-d]isoindole-2,18(5H)-dione; (3E,5S,9R,11E,12aS,13S,15S,18aS)-16-benzyl-5,13-dihydroxy-9,15-dimethyl-14-methylidene-6,7,8,9,10,12a,13,14,15,15a,16,17-dodecahydro-2H-oxacyclotetradecino[2,3-d]isoindole-2,18(5H)-dione

CAS:14930-96-2

EINECS:239-000-2

分子式:C29H37NO5

分子量:479.6078

CB = cytochalasin B

松胞菌素B；松胞素B；细胞分裂抑素B；针状结晶。通常情况下稳定。不溶于水。熔点218～221℃。有毒。本品应密封于0℃以下干燥保存。C29H37NO3。从真菌类Helminthosporium de－mariodeum中分离得到的代谢产物。是以希腊语的cytos（细胞）和chalasis（松弛）组合而命名的。在许多动植物细胞的细胞运动中，特别是可逆地抑制同微丝系有关的现象。例如在0.5—1.0微克/毫升浓度下作用24小时，会使鼠的培养纤维芽细胞只进行核分裂，而细胞质的分裂受到抑制，从而成为多核细胞。5微克/毫升可阻止蛙的受精卵的卵裂沟的形成，致使不能进行正常的卵裂，也抑制淋巴球、海胆卵、肺上皮细胞等的细胞质分裂，还阻止原肠陷入（海胆、螠虫等），鸡的第五天的雏鸡输卵管的管状腺的形成，唾液腺的形成，阻止因胚神经索的生长圆锥的运动引起的伸长等，阻止发育、形态形成等过程。此外，还阻害游离细胞的移动，分离胚细胞的相互选别，阻止细胞向玻璃面上粘着和白血球的吞食作用、血小板的凝集、血饼的收缩、生长激素的释放、甲状腺素的分泌等。对于植物来说，30微克/毫升，1小时以内可以使燕麦的孑叶鞘和车轴藻的原生质流动完全停止。在这些情况下，用电子显微镜观察，常能见到微丝的镜相变化，其他已知细胞松弛素B还可抑制糖的输送，可以考虑细胞松弛素B与细胞膜间的相互作用。此外还分离出数种具有类似结构和功能的物质，分别命名为细胞松弛素A、C、D、E、F。