OCCc1ccsc1-c1sc(-c2cc(CCO)c(-c3sc(-c4cc(CCO)c(-c5sccc5CCO)s4)cc3CCO)s2)cc1CCO
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. Amide C-N bonds are not counted because of their high barrier to rotation.  How many rotatable bonds does the molecule have?