Chemical Composition and Evaluation of the α-Glucosidase Inhibitory and Cytotoxic Properties of Marine Algae Ulva intestinalis, Halimeda macroloba, and Sargassum ilicifolium

Table 5

Chemical composition of Ulva intestinalis.

No	Name	Retention time	Area, %	Molecular formula
Phenol
1	Phenol, 3,5-bis(1,1-dimethylethyl)-	15.980	5.10	C14H22O
Ketone
2	2-Pentadecanone, 6,10,14-trimethyl-	19.695	2.28	C18H36O
Aldehyde
3	E-14-Hexadecenal	16.900	1.09	C16H30O
Alcohol
4	3,7,11,15-Tetramethyl-2-hexadecen-1-ol	20.062	2.23	C20H40O
5	1-Dodecanol, 3,7,11-trimethyl-	22.334	1.17	C15H32O
Hydrocarbons
6	8-Heptadecene	17.901	0.66	C17H34
7	1-Octadecene	19.160	0.79	C18H36
Fatty acids
8	n-Hexadecanoic acid	20.981	6.93	C16H32O2
9	Oleic acid	22.664	3.26	C18H34O2
10	Octadecanoic acid	22.861	0.51	C18H36O2
11	15-Hydroxypentadecanoic acid	23.999	0.78	C15H30O3
	14-Pentadecenoic acid	26.733	1.51	C15H28O2
Sterols
12	Stigmast-5-en-3-ol, oleate	30.028	1.24	C47H82O2
Fatty acid methyl/ethyl esters
13	Cyclopentanetridecanoic acid, methyl ester	18.426	0.49	C19H36O2
14	Hexadecanoic acid, methyl ester	20.545	6.40	C17H34O2
15	9,12-Octadecadienoic acid, methyl ester	22.180	0.72	C19H34O2
16	9-Octadecenoic acid, methyl ester, (E)-	22.239	3.26	C19H36O2
17	11-Octadecenoic acid, methyl ester	22.297	0.81	C19H36O2
18	9,12-Octadecadienoic acid, methyl ester	22.180	0.72	C19H34O2
19	9-Octadecenoic acid, methyl ester, (E)-	22.239	3.26	C19H36O2
20	Octadecanoic acid, methyl ester	22.473	0.64	C19H38O2
21	Hexadecanoic acid, propyl ester	25.320	1.04	C19H38O2
Other
22	Hexadecanoic acid, 2-hydroxy-1- (hydroxymethyl)ethyl ester	23.601	1.91	C19H38O4
23	Benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-, methyl ester	20.642	5.21	C18H28O3
24	9-Octadecenamide, (Z)-	23.049	0.54	C18H35NO
25	Octadecanoic acid, 2,3-dihydroxypropyl ester	25.310	0.97	C21H42O4
26	Cyclohexanecarboxylic acid, undec-10-enyl ester	25.485	1.39	C18H32O2
27	1,2-Benzenedicarboxylic acid, mono(2-ethylhexyl) ester	25.946	7.61	C16H22O4