A method of preparing a pyrrolotriazin-4-one and a method of preparing the isothiocyanatoformic acid ester derivative which can be used as a reactant in that method of preparing a pyrrolotriazin-4-one. In the processing step, the constituent images collected in the image acquisition step are selected and further processed to form a multimedia sequence which allows for the interactive view of the object. A composition can be formed from a kit including a first mixture having calcium sulfate hemihydrate and a plasticizing substance, a second mixture having demineralized bone, and a mixing solution.