Radical polymerizable compound having at least one connecting hetero atom

A radical polymerizable compound comprising a structure represented by the following formula (I), (II) or (III):

• wherein X3 represents a heterocyclic group that is connected through a hetero atom included therein;
• Q1 represents a group represented by CN or COX2;
• X2 represents a hydroxy group, a substituted oxy group, a substituted thio group, an amino group, a substituted amino group, a heterocyclic group that is connected through a hetero atom included therein or a halogen atom;
• X1 represents a substituted oxy group, a substituted amino group, a heterocyclic group that is connected through a hetero atom included therein or a halogen atom;
• Z1 and Z2 each represents a n-valent connecting group having at least 6 carbon atoms, in which the n's connecting parts are all hetero atoms;
• Ra and Rb, which may be the same or different, each represents a hydrogen atom, a halogen atom, a cyano group or an organic residue;
• or Ra and Rb, X1 and Ra or Rb, X3 and Ra or Rb, or Q1 and Ra or Rb may combine with each other to form a cyclic structure;
• and n represents an integer of from 2 to 6.