[chemical substances] Count: 378c;28s reactive intermediates Count: 74c;14s Class dipolar compounds Count: 20c;1s Class 1,3-dipolar compounds Count: 13c;1s Class Propargyl type 1,3-dipolar compounds [X≡N+-Z <-> X-=+N=Z <-> X-=NZ+ <-> XN=Z (X=C,O; Z=C,N,O)] Count: 3c;1s Class azides [RN=N+=-N] Count: -