CCOC(=O)C1=C(C)N=c2sc(=Cc3cc(Cl)c(OCC(=O)O)c(Cl)c3)c(=O)n2C1c1cccc(OC)c1
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?