Italian chemical giant Montedison S.p.A. , through its Montedison Acquisition N.V. indirect unit , began its $ 37-a-share tender offer for all the common shares outstanding of Erbamont N.V. , a maker of pharmaceuticals incorporated in the Netherlands . | <s> start field production Tuesday </s><s> | begin /83/Activity_start/RootInDisc | S.p.A. offer </s><s> begin demand taper </s> |