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system
Provide the molecular formula for the IUPAC named substance 1-phenyl-2-spiro[fluorene-9,6'-indeno[2,1-b][1]benzofuran]-2-ylbenzimidazole;2-spiro[fluorene-9,6'-indeno[2,1-b][1]benzofuran]-10'-yl-1,3-benzothiazole;2-spiro[fluorene-9,6'-indeno[2,1-b][1]benzofuran]-4-yl-1,3-benzoxazole .
user
C108H62N4O4S
assistant