Robuta

https://webbook.nist.gov/cgi/inchi/InChI%3D1S/C18H28O4Si/c1-14(2)11-12-21-18(19)10-8-15-7-9-16(20-3)17(13-15)22-23(4%2C5)6/h7-10%2C13-14H%2C11-12H2%2C1-6H3/b10-8%2B 3-Methylbutyl (E)-isoferulate, TMS etms