Table 4.

Metabolites identification from MCEs-W by using LC-ESI-MS negative [M-H(-)] and positive ionization mode [M+H(+)] (The symbol “+” indicates “Present”, and “ND “indicates “Not detected”).

Compounds	tR	m/z	N. oculata	T. suecica	Chlorella sp
Negative Ions
1. Fatty acid
Stearidonoyl-CoA	1.39	544.94	+	+	+
Octadecanoic acid trichloroethyl ester isomer	32.08	414.18	+	+	+
2. Fatty amides
N-oleoyl glutamine	13.68	410.31	+	+	+
3. Amino acid
Geranylgeranylcysteine	1.64	407.24	+	+	+
Geranylgeranylcysteine isomer	1.92	407.24	+	+	+
4. Vitamins
Phylloquinone	1.59	450.77	+	+	+
5. Others
Gancaonin Q	15.11	406.17	+	ND	+
Gancaonin Q isomer	15.32	406.17	+	+	+
Paratocarpin E	15.27	408.21	+	+	ND
8-oxo-dGDP	10.76	443.21	+	+	+
8-oxo-dADP	10.98	424.18	+	+	+
Geranylgeranyl diphosphate	22.90	450.45	+	+	ND
Didecyl phthalate	1.81	446.73	+	+	+
Unknown	15.37	435.27	+	+	+
Positive Ions
1. Carotenoids
Meso-Zeaxanthin/(3R,3′S)-Zeaxanthin	26.48	569.44	+	+	ND
Meso-Zeaxanthin/(3R,3′S)-Zeaxanthin isomer	32.91	569.44	+	+	+
2. Chlorophyll
Methyl pyrophaeophoribide	1.71	548.67	+	+	+
Protoporphyrinogen IX	20.03	591.29	+	+	ND
Protoporphyrinogen IX isomer	28.32	591.29	+	+	+
3. Vitamins
Riboflavin cyclic-4′,5′-phosphate	18.20	438.32	+	ND	ND
Phylloquinone	1.59	450.77	+	+	+
Ascorbyl stearate	28.17	442.30	+	+	ND
Ascorbyl stearate isomer	29.07	442.30	+	+	ND
4. Others
Stachyose	1.82	666.56	+	+	+
Hexatriacontane	27.95	506.97	+	ND	ND
Didecyl phthalate	1.79	446.68	+	+	ND
Heptasiloxane, hexadecamethyl-	15.91	533.14	+	ND	ND
Heptasiloxane, hexadecamethyl- isomer	19	533.14	+	ND	ND