Fig. 1From: Activity of phytochemical constituents of Curcuma longa (turmeric) and Andrographis paniculata against coronavirus (COVID-19): an in silico approachStructures of phytochemical constituents. a Chemical structures of selected major bioactive constituents of Curcuma longa (turmeric). b Chemical structures of selected major bioactive constituents of Andrographis paniculata (Burm.f.) Nees. c Structure of hydroxychloroquine (Std)Back to article page