To evaluate the potential antimicrobial activity, Aloe vera and Opuntia ficus-indica plants were collected from Jeddah, Al Baha, Taif areas of Kingdom Saudi Arabia (SA), their ethanolic extracts screened by gas chromatography mass spectrometry (GC–MS/MS). The di(2-propylpentyl) ester hexadecenoic acid ethyl phthalic most abundant compounds in A. extract, 1-(benzyloxy)-3,5-dinitrobenzene phenol,...