It says "and if this too is unavailable,it can be synthezized easily by the Eschweiler-Clarke methylation(15)of the very basic building block 1-amino-2-propanol,using formaldehyde and formic acid.I'ev spent a lot of time looking for this step,but can't find it.I know it's there and that I probably looking for it with the wrong wording.Can someone point me in the proper direction? Thank You