CCC(C)NC(=O)CSc1nc2cc3c(cc2c(=O)n1Cc1ccc(C(=O)NCCc2ccc(OC)c(OC)c2)cc1)OCO3
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?