// ############################## START FUNC ############################################
// Here atom from_atom is compared with atom to_atom. If both are aromatic, and located
// in the same ring, without "#" between, and the path includes a mark, "complex", then
// false is returned, else true.

function check_arom(from_atom, to_atom, arred_atoms, path, atom_sorts)
{

if(path.indexOf("complex")==-1) return false;

if(atom_sorts[from_atom]-(-atom_sorts[to_atom])==8 && atom_sorts[from_atom]*atom_sorts[to_atom]==7) return false;

// Above, the step N->H and H->N is included in complex for later detection in recognize_patterns.

var i=arred_atoms.indexOf(" "+from_atom+" ");
var j=arred_atoms.indexOf(" "+to_atom+" ");

if(i==-1) return true;
if(j==-1) return true;

// The atoms which are first in the string must be indexed as i2, not j2

var j2=Math.max(i,j);
var i2=Math.min(i,j);

if(arred_atoms.indexOf("#",i2) < j2 && arred_atoms.indexOf("#",i2)!=-1) return true;

return false;

}

// ############################### end func ############################################