Why the following CAML query not working?

<Where><And>

<And>

<Eq>

<FieldRef Name='_x007b_86ae3345_x002d_8dfc_x002d_4630_x002d_ae42_x002d_ecfa22d338a1_x007d_'/><Value Type='Text'>cxc</Value>

</Eq>

</And>

<And>

<Eq>

<FieldRef Name='_x007b_65203d9a_x002d_d648_x002d_4033_x002d_9a8f_x002d_4b39db15cc24_x007d_'/><Value Type='Text'>12</Value>

</Eq>

</And>

</And></Where>