SEARCH Articles Figures Tables 3- thiophene, synthesis Klemm, L, H., Syntheses of Tetracyclic and Pentacyclic Condensed Thiophene Klemm, L. H., Syntheses of Tetracyclic and Pentacyclic Condensed Thiophene Systems Synthesis, of tetracyclic and pentacyclic condensed thiophene systems Tetracycles Tetracyclic Tetracyclics Tetracyclization Thiophenes, synthesis