Condensation or \u201crain-out\u201d is a problem in breathing circuits and especially neonatal breathing circuits. Even when the external mirror hits or bumps against an obstacle, the protruding portion is the first and likely only portion which hits or bumps against the obstacle thereby preventing the indicator light from being damaged. The direct memory access unit may be configured to store the first picture among the physical pages according to the list and the mapping. However, in the event continuity of the lock with the thread ceases, a compare-and-swap operation is executed to reset the lock with the same thread or another thread. Also provided are methods for preparing compounds of the following structure:wherein, R9, m, n, p, r, and s are defined herein.