(4s,7r,8s,9s,10z,13z,16s)-4,8-dihydroxy-5,5,7,9,13-pentamethyl-16-[(e)-1-(5-methyl-1,2-oxazol-3-yl)prop-1-en-2-yl]-1-oxacyclohexadeca-10,13-diene-2,6-dione