02:	43:6 is missed because M+1 overlaps with strong peak from another species
03:	43:6 is missed because M+1 overlaps with strong peak from another species
04:	43:6 is missed because M+1 overlaps with strong peak from another species
05:	43:6 is missed because M+1 overlaps with strong peak from another species
05:	wrong FA composition reported for 37:4

All of the analytes are detected and can be verified, except for 43:6 which is
detected only once because of a strong other analyte at the M+1 isotope. FA compositon
is correctly assigned 2 times for 12:0_13:0, 1 time for 17:0_14:1, 3 times for
17:0_20:4, and 1 time for 21:0_22:6. One time, two wrong assignments are reported for
17:0_20:4 where the correct fragments are not present in the spectra.
Positional assignment: the NL-Ketene_head at sn-2 seems to be stronger than the one on sn-1,
however, this observation is mainly due to 17:0_20:4, and one analyte is a little bit weak
evidence for a generalized position rule. Thus, we refrained from generating position
rules based on this evidence.
