TY - RPRT TI - Difficult couplings in stepwise solid phase peptide synthesis: predictable or just a guess? AU - W J van Woerkom AU - J W van Nispen PY - 1991 DO - 10.1111/j.1399-3011.1991.tb01417.x UR - https://pubmed.ncbi.nlm.nih.gov/1783486/ ID - 1783486 ER -