The Potential of Antivirus Compounds in Gletang (Tridax procumbens Linn.) in Inhibiting 3CLpro Receptor of SARS-CoV-2 Virus by In Silico, Islamiati, Yuna, Suryani Yani, Adawiyah Ayuni, Taufiqurrohman Opik, Kharisma Viol Dhea, Purnamasari Devi, Soekamto Nunuk Hariani, Rahaju Anny Setijo,, Mandeli Riso Sari, et al. , Pharmacognosy Journal, December 2022, Volume 14, Issue 6, p.796-805, (2022)