PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 24837276-1 2014 We describe the quantitative [2 + 2] photocycloaddition of crystalline trans-2,4-dichloro-6-styrylpyrimidine to produce the corresponding htt r-ctt cyclobutane dimer, and we present (1)H NMR analysis of the photolysis of this and six other mono-, di-, and triazastilbenes in solid and solution states. trans-2,4-dichloro-6-styrylpyrimidine 71-108 huntingtin Homo sapiens 138-141