MassBank, https://massbank.eu/
License: CC BY 4.0
Have an unknown? Upload it and match against (2XI,4AS,5S,8AS)-(-)-2,5BETA-DIMETHYL-8ABETA-FORMYL-5ALPHA-(4-METHYL-3-PENTENYL)-3,4,4A,5,6,7,8,8A-OCTAHYDRONAPHTHALEN-1(2H)-ONE and thousands more references with HQI scoring.