title: [Bis-3-chromonyl-methanes from bis(4-hydroxy-3-coumarinyl)-methanes].
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D003374:Coumarins / Q000138:chemical synthesis*; D006868:Hydrolysis; D011083:Polycyclic Compounds / Q000138:chemical synthesis; D011714:Pyrans; D013055:Spectrophotometry, Infrared
chemical_list: D003374:Coumarins; D011083:Polycyclic Compounds; D011714:Pyrans
vernacular_title: Bis-3-chromonyl-methane aus Bis (4-hydroxy-3-cumaninyl)-methanen 49. Uber Untersuchungen an 4-PYRONEN