Halichondrin B

(1″R,2S,2′S,3″R,3aS,3a′R,5R,6″R,7R,7′S,7aR,7a′S,9″R,12″R,14″R,16″R,18″S,20″R,22″R,26″R,28″S,29″S,30″R,34″R,37″S,39″R,40″S,41″R,43″S,44″S)-7,7′,14″,29″-Tetramethyl-8″,15″-bis(m ethylene)-2-[(1S,3R)-1,3,4-trihydroxybutyl]decahydro-3′H,32″H-dispiro[furo[3,2-b]pyran-5,5′-furo[3,2-b]pyran-2′,24″-[2,19,23,27,31,38,42,45,47,48,49]undecaoxaundecacyclo[32.9.2.1~3,40~.1~3,41~.1~6,9 ~.1~12,16~.0~18,30~.0~20,28~.0~22,26~.0~37,44~.0~39,43~]nonatetracontan]-32″-one (non-preferred name)

103614-76-2

Halichondrin B