NMR Simulate
Just enter the chemical shifts (in PPM) and the coupling constants (in Hz) and simulate exactly any system from AB to ABCDEF. This tool can simulate second order effect accurately.
Reference
- Andrés M. Castillo, Luc Patiny and Julien Wist. Fast and Accurate Algorithm for the Simulation of NMR spectra of Large Spin Systems. Journal of Magnetic Resonance 2011.