title: Electronic spectra of crystalline 9-ethylguanine and guanine hydrochloride.
mesh_terms: D003461:Crystallography; D006147:Guanine / Q000031:analogs & derivatives*; D008722:Methods; D011048:Polarography; D013053:Spectrophotometry
chemical_list: D006147:Guanine; C014542:9-ethylguanine