De kan have et multiplicerende præfiks som f.eks. bi, bis, di, hemi, hepta, hexa, mono, penta, sesqui, tetra, tri, tris… (f.eks. diacetat).
They can be preceded by a multiplying prefix such as bi, bis, di, hemi, hepta, hexa, mono, penta, sesqui, tetra, tri, tris… (e.g. diacetate).