The present disclosure generally relates to injectable compositions. To prevent the dewetting phenomenon of said patterns, lateral oxidized zones are arranged at the periphery of each pattern of the thin film so as to form an anchoring. Thus, this invention allows 5\u2032-protected thymidines, which cannot be purified in an industrial scale by the prior art, to be easily provided with a high purity in a large scale. The key button is partially attached to the base body and aligns with the protective piece. Data from the correlated model is used to drive the mechanism for modifying the depth of focus of the objective, prism, or other optical device to maintain the surface of the exemplary target in focus. Slice representations may also comprise overlapping objects andor slice region coordinates.