Two catecholic phenolic acids (1 and 2) obtained from 80% methanolic extract of Perilla frutescens var. frutescens leaves through chromatography showed strong DPPH (1: $IC_{50}$ = 15.5 ${mu}M$, 2: $IC_{50}$ = 11.7 ${mu}M$) and ABTS (1: $IC_{50}$ = 5.5 ${mu}M$, 2: $IC_{50}$ = 4.6 ${mu}M$) radicals scavenging abilities. Antioxidant compounds contents of 1 and 2 as determined by $C_{18}$ reversed phase HPLC coupled with diode-array detector were 2.98 and 2.26 mg/g, respectively.