Showing structure for (13r)-13,21-dihydroxy-5,7,29-trimethoxy-13,23-dimethyl-16-oxahexacyclo[15.12.0.0²,¹¹.0⁴,⁹.0¹⁸,²⁷.0²⁰,²⁵]nonacosa-1(29),2(11),4,6,8,17,20,22,24,27-decaene-3,10,15,19,26-pentone