N#Cc1ccccc1Cn1c(=O)n(CCCC(=O)NCc2ccc3c(c2)OCO3)c(=O)c2ccccc21
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?