"Sulfure." . . "Compostos heterocíclics." . . "Electronic books." . . "Stickstoffverbindungen." . . "SCIENCE / Chemistry / Organic" . . "Composés hétérocycliques." . . "Schwefelverbindungen." . . "Schwefelverbindungen Heterocyclen." . . "Stickstoffheterocyclen." . . "Heterocyclische Verbindungen." . . "Sauerstoffverbindungen." . . "Sauerstoffheterocyclen." . . . . "Stickstoffverbindungen Heterocyclen." . . "Heterocyclen Stickstoffverbindungen." . . "Schwefelheterocyclen." . . "Azote." . . "Five-membered heterocyclic compounds with nitrogen and sulfur or nitrogen, sulfur, and oxygen (except thiazole)" . "Five-membered heterocyclic compounds with nitrogen and sulfur or nitrogen, sulfur, and oxygen (except thiazole)"@en . "Five-membered heterocyclic Compounds with nitrogen and sulfur or nitrogen, sulfur, and oxygen <except thiazole>" . . "Five membered heterocyclic compounds with nitrogen and sulfur or nitrogen sulfur and oxygen (except thiazole)" . . . . . . . . . . . . "Electronic books"@en . . . . . . . . "Five-membered heterocyclic compounds with nitrogen and sulfur or nitrogen, sulfur, and oxygen : (except thiazole)" . . . . . . . . "Five-Membered Heterocyclic Compounds with Nitrogen and Sulfur or Nitrogen, Sulfur, and Oxygen-except Thiazole"@en . . . . . . . . . . . . . . . . . . . . . . . "Five-membered heterocyclic compounds with nitrogen and sulfur or nitrogen, sulfur and oxygen (except thiazole)"@en . "Five-membered heterocyclic compounds with nitrogen and sulfur or nitrogen, sulfur and oxygen (except thiazole)" . . . "Soufre Composés organiques." . . "Heterocyclen Schwefelverbindungen." . . "Azote Composés organiques." . .