Etodolac EP Impurity C

Chemical Name: (1RS)-8-ethyl-1-methyl-1,3,4,9-tetrahydropyrano[3,4-b]indol-1-yl]acetic acid (as per EP); (+/-)-8-Ethyl-1-methyl-1,3,4,9-tetrahydropyrano [3,4-b]-indole-1-acetic acid (as per USP)