[(1RS)-1,8-Diethyl-1,3,4,9-tetrahydropyrano[3,4-b]indol-1-yl]acetic Acid; 1,8-Diethyl-1,3,4,9-tetrahydropyrano[3,4-b]indole-1-acetic Acid; (RS)-Etodolic Acid; (+/-)-Etodolac (USP);