Disclosed are N-{1-3-sulfonylphenyl)-4,5-dihydro-5-oxo-1,2,4-triazin-6-ylethyl}butyramide, its preparation method, intermediates during preparation procedure, preparation method for such intermediates and a method for preparing vardenafil from the compound. A cuff is attached to a tether at the end of the rod in a non-deployed position. The customer list may be used to indicate one or more customers, the network elements associated therewith, and network addresses for each of the listed network elements. The tool removes, by one or more computer processors, the one or more nets initialized in response to initialization of each of one or more latches in one or more test channels of the circuit design being tested.