In this task, you're given a paragraph from the research paper and your task is to generate a suitable title for the research paper based on the given paper. Under 100 words is a good title length.

[Q]: Quinone-methide triterpenes, celastrol (1), pristimerin (2), tingenone (3), and iguesterin (4) were isolated from Triterygium regelii and dihydrocelastrol (5) was synthesized by hydrogenation under palladium catalyst. Isolated quinone-methide triterpenes (1-4) and 5 were evaluated for SARS-CoV 3CL pro inhibitory activities and showed potent inhibitory activities with IC 50 values of 10.3, 5.5, 9.9, and 2.6 lM, respectively, whereas the corresponding 5 having phenol moiety was observed in low activity (IC 50 = 21.7 lM). As a result, quinone-methide moiety in A-ring and more hydrophobic E-ring assist to exhibit potent activity. Also, all quinone-methide triterpenes 1-4 have proven to be competitive by the kinetic analysis.
[A]: SARS-CoV 3CL pro inhibitory effects of quinone-methide triterpenes from Tripterygium regelii


[Q]: Most acute respiratory infections (ARIs) in children are due to viral etiology, and represent an important cause of mortality and morbidity in children <5 years old in developing countries. The pathogens that cause ARIs vary geographically and by season, and viruses serve a major role. In the present study, the distribution of the seven respiratory viruses that are more prevalent in Southern European countries were retrospectively analyzed in a Southern Italy Hospital, that centralizes pediatric diseases from the Naples province. Viruses were categorized by a FilmArray Respiratory Panel, and demonstrated no substantial differences in sex, age and seasonal viruses distribution. However, all the investigated viruses had a higher detection rate in the surrounding municipalities than in the metropolitan area of Naples. In recent years, the association between air pollution and respiratory infections has become an increasing public health concern. The data in this study support this association in the surrounding areas of Naples extensively contaminated by environmental toxic agents. In these areas, characterization of the epidemiology of ARIs is required to implement a prevention and control program.
[A]: Characterization of respiratory infection viruses in hospitalized children from Naples province in Southern Italy


[Q]: For the purpose of this article, Asia refers to WHO's combined South-East Asia and Western Pacifi c regions and thus includes Australia and New Zealand. Asia has the highest number of tobacco users and is the prime target of transnational tobacco companies. The future of global tobacco control rests in this region and the challenges are clear. China, India, and Indonesia are key markets and Asia is a frontrunner in tobacco control measures, such as plain packaging of cigarettes. Some countries in Asia have a long history of tobacco control activities beginning in the 1970s, and WHO's Western Pacifi c Region is still the only region where all countries have ratifi ed WHO's Framework Convention on Tobacco Control. We reviewed the history, research, epidemiology, tobacco control action, obstacles, and potential responses and solutions to the tobacco epidemic in this region. Levels of development, systems of government, and population size are very diff erent between countries, with population size ranging from 1500 to 1·3 billion, but similarities exist in aspects of the tobacco epidemic, harms caused, obstacles faced, and tobacco control actions needed.
[A]:
Tobacco Control 2 Tobacco control in Asia