C=CCn1c(SCC(=O)N(CCOC)c2c(N)n(CC(C)C)c(=O)[nH]c2=O)nc2ccccc21
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?