I am trying to map my metabolites to NCBI bioSystems pathways. However, I am not familiar with API. Can anyone teach me a bit how to extract all pathway from NCBI bioSystems. What I would like to do is to create a pathway list including all paths from bioSystems and each path has its corresponding compounds/genes. I prefer R, but I can code in python or bash, too. Please feel free to give me some advices or instructions.
Thanks in advance.