Keywords: Alizarin-yellow-R-2243-76-7-acid-2D-skeletal.png Skeletal formula of Alizarin Yellow R C<sub>13</sub>H<sub>9</sub>N<sub>3</sub>O<sub>5</sub> CAS 2243-76-7 Structure from http //www hbcpnetbase com/ CRC Handbook 88<sup>th</sup> edition Own 2009-03-22 Ben Mills Benjah-bmm27 Images by Ben Mills Alizarin Yellow R |