Showing structure for (1s,2r,4r,5s,9s,13r,17s,18s,20s)-2-(acetyloxy)-5,9,13-trimethyl-22-oxo-19,21,24-trioxahexacyclo[16.5.1.0¹,²⁰.0⁴,¹⁷.0⁵,¹⁴.0⁸,¹³]tetracosane-9-carboxylic acid