isoliquiritigenin + S-adenosyl-L-methionine => 2'-O-methylisoliquiritigenin + S-adenosyl-L-homocysteine + H(+)
isoliquiritigenin + s-adenosyl-l-methionine => 2'-o-methylisoliquiritigenin + s-adenosyl-l-homocysteine + h(+)