Organic IntermediateChina Chemical Intermediate High Purity N-Octyl-2-Pyrrolidone/Nop/N-Octyl-Pyrrolidone/Octylpyrrolidone CAS 2687-94-7, Find details about China N-Octyl-Pyrrolidone, N-Octyl-2-Pyrroliodne from Chemical Intermediate High Purity N-Octyl-2-Pyrrolidone/Nop/N-Octyl-Pyrrolidone/Octylpyrrolidone CAS 2687-94-7