Recipe 2.1.1. Building molecule expression

You want to create new molecules from expression.

ChemicalFacade provide a way to create a molecule from expression of others molecule or formulae:

import org.expasy.jpl.core.mol.chem.ChemicalFacade;

Molecule molecule =
	ChemicalFacade.newMolecularExpressionBuilder()
		.plus("CH3").plus("NH4").build();
// CH7N
System.out.println(molecule);

Molecule otherMolecule =
	ChemicalFacade.newMolecularExpressionBuilder()
		.plus(molecule).plus("NH4").build();
// CH11N2
System.out.println(otherMolecule);
		
Molecule sameFirstMolecule =
	ChemicalFacade.newMolecularExpressionBuilder()
		.plus(otherMolecule).minus("NH4").build();
// CH7N
System.out.println(sameFirstMolecule);
		
Assert.assertTrue(molecule.equals(sameFirstMolecule));