Showing structure for (2z)-4-[(1s,2s,19r,21r)-14-hydroxy-19-methoxy-8,23,23-trimethyl-5-(3-methylbut-2-en-1-yl)-16,20-dioxo-11-(prop-1-en-2-yl)-3,7,22-trioxaheptacyclo[17.4.1.1⁸,¹².0²,¹⁷.0²,²¹.0⁴,¹⁵.0⁶,¹³]pentacosa-4(15),5,13,17-tetraen-21-yl]-2-methylbut-2-enoic acid