(1S,5R,11R,14R,17S,20S,21R)-5-methyl-15-methylidene-7-oxa-10-azaheptacyclo[12.6.2.0~1,11~.0~5,20~.0~6,10~.0~12,17~.0~17,21~]docosane-19,22-dione (non-preferred name)