From ethanolic extract of Viburnam cylindricum plant a (4aS, 5R, 6S)-6-(3,4,5-trihydroxy-6(hydroxymethyl) tetrahydro-2H-pyran-2-yloxy)-5-vinyl-4,4a,5,6-tetrahydropyrano[3,4-c]pyran-1(3H)-one Iridoid have been isolated and characterized with help of 1 H, 13 C NMR, 1 H-1 H COSY, DEPT and HMQC studies. This is new studies in chemical analysis of Viburnam cylindricum.