COc1cccc(-c2nc3c(c(SCC(=O)Nc4cc(C)ccc4C)n2)Cc2c(CO)cnc(C)c2O3)c1
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?