**Table 4:** Abundance ratios (in number) of HD 45166 compared todifferent object classes.
Object	He/H	C/N	O/N	Reference
HD 45166	0.5	1.5	0.75	1
Sun	0.085	8.6	7.2	2
PN I	0.14	0.7-3	1.2	3
PN II	0.11	1.4-9	3.5	3
WNL	H-free	0.04	...	4
WNE	H-free	0.02	...	4
WNEw	1.5	0.005	0.05	4

References: (1) this work; (2) Grevesse et al. (2007);
(3) Peimbert (1990); (4) Crowther (2007).

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