17.1.1 Syntax of the BUILD Command

     BUILD [COMPARE] [PARM ] class repeat([WRITE unit-number] property del)
           [ DIFF  ] [IUPAC]
     
           [TITLE string del]
     
               {  BOND  }
               {  ANGLE }
     class ::= {TORSION }
               {IMPROPER}
               {  HBOND }
               {  ATOM  }
     
     property ::= string

Syntactic ordering: The operands must be specified in the above order, except for TITLE which can be specified anywhere after the class.