141
Six-membered hetarenes with two unlike or more then tow heteroatoms and fully unsaturated larger-ring heterocycles /
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142
Three carbon-heteroatom bonds : acid halides, carboxylic acids and acid salts /
Book
143
Three carbon-heteroatom bonds : ester and lactones, peroxy acids and R(CO)OX compounds, R)CO)X,X=S, SE, TE /
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144
Three carbon-heteroatom bonds : nitriles, isocyanides, and derivatives /
Book
145
X-Ene-X(X=F, C1, Br, I, O, S. Se, Te, N. P), Ene-Hal, and Ene-O compounds /
Book