I have to say, that this is an NMR of a big ol' pile of garbage. Thats OK, we all make plenty of such piles, but its so messy that there isn't much information here. Its just a bunch of oligomeric crap. Try running the reaction again more carefully (and again, and again) until you have better resolved peaks.
Here is an NMR of lactulose http://www.hmdb.ca/spectra/nmr_one_d/5170
. Its not pretty, but you can still see where things are better resolved.
P.S. I found that by typing in "lactulose NMR" into google and clicking the very first link.