(1″S,2S,2′S,3″S,3aS,3a′S,5R,7S,7′R,7aS,7a′S,9″S,12″S,14″R,16″R,18″S,29″S,34″R,37″S,40″S,41″S,43″R,44″S)-7,7′,14″,29″-Tetramethyl-8″,15″-bis(methylene)-2-[(3R)-1,3,4-trihydroxybutyl]d ecahydro-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~.0~37,4 4~.0~39,43~]nonatetracontan]-32″-one (non-preferred name)

(1″S,2S,2′S,3″S,3aS,3a′S,5R,7S,7′R,7aS,7a′S,9″S,12″S,14″R,16″R,18″S,29″S,34″R,37″S,40″S,41″S,43″R,44″S)-7,7′,14″,29″-Tetramethyl-8″,15″-bis(methylene)-2-[(3R)-1,3,4-trihydroxybutyl]d ecahydro-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~.0~37,4 4~.0~39,43~]nonatetracontan]-32″-one (non-preferred name)

From marine animal, Axinella sp.