-V3000

def _read_mol(self):
        """-V3000"""
        self.system = dict()
        if self.file_content[2] != '\n':
            self.system['remarks'] = self.file_content[2]
        file_body = [i.split() for i in self.file_content]
        elements = []
        coordinates = []
        atom_data = False
        for line in file_body:
            if len(line) > 2:
                if line[2] == 'END' and line[3] == 'ATOM':
                    atom_data = False
                if atom_data is True:
                    elements.append(line[3])
                    coordinates.append(line[4:7])
                if line[2] == 'BEGIN' and line[3] == 'ATOM':
                    atom_data = True
        self.system['elements'] = np.array(elements)
        self.system['coordinates'] = np.array(coordinates, dtype=float)
        return self.system