Volume 3: Compounds of Groups 12 and 11 (Zn, Cd, Hg, Cu, Ag, Au) 3.6 Product Class 6: Organometallic Complexes of Gold 3.6.17 Organometallic Gold Catalysis in Combination with Enzyme, Organo-, or Transition-Metal Catalysis Volume 8: Compounds of Group 1 (Li&‌#8943;Cs) 8.1 Product Class 1: Lithium Compounds 8.1.6 Product Subclass 6: Lithium Amides Volume 15: Six-Membered Hetarenes with One Nitrogen or Phosphorus Atom 15.5 Product Class 5: Isoquinolines 15.5.4 Isoquinolines Volume 18: Four Carbon–Heteroatom Bonds: X–C"X, X=C=X, X2C=X, CX4 18.12 Product Class 12: Imidic Acids and Derivatives, Isoureas and Derivatives, Sulfur and Selenium Equivalents, and Analogously Substituted Methylenephosphines 18.12.26 Imidic Acids and Derivatives, Isoureas and Derivatives, Sulfur and Selenium Equivalents, and Analogously Substituted Methylenephosphines 18.13 Product Class 13: Guanidine Derivatives 18.13.2 Guanidine Derivatives 18.14 Product Class 14: Phosphorus Analogues of Guanidine 18.14.6 Phosphorus Analogues of Guanidine