Table 2.

List of the saffron metabolites found in the UHPLC-DAD chromatograms detected at 440 nm collected with the Luna Omega Polar C18 column under the conditions described in Section 3.4: retention time (RT), assigned structure or chemical class, absolute and relative maxima of the absorption spectra.

RT (min)	Compound/Chemical Class	Abbreviation a	λmax
7.40	trans-crocin	T1	259, 444, 466
7.46	trans-crocetin (tri-β-d-glucosyl)(β-d-gentiobiosyl) ester	t-5tG	262, 442, 465
7.60	unknown	U1	243, 418, 440
7.86	trans-crocetin (β-d-neapolitanosyl) (β-d-gentiobiosyl) ester	t-5nG	262, 440, 464
8.16	cis-crocin	C1	260, 327, 441, 464
8.20	trans-crocin	T2	262, 441, 462 sh
8.26	trans-crocin	T3	259, 442, 464
8.37	trans-crocin	T4	264, 437, 466 sh
8.48	trans-crocetin bis(β-d-gentiobiosyl) ester	t-4GG	262, 443, 466
8.60	unknown	U2	244, 415, 440
8.71	trans-crocin	T5	262, 437, 464
9.14	trans-crocetin (β-d-neapolitanosyl)(β-d-glucosyl) ester	t-4ng	262, 441, 465
9.28	trans-crocin	T6	261, 438, 464
9.35	trans-crocin	T7	260, 441, 463
9.44	trans-crocetin (β-d-gentiobiosyl)(β-d-glucosyl) ester	t-3Gg	262, 441, 465
9.52	trans-crocin	T8	260, 440, 464
9.94	unknown	U3	308, 413, 434
10.16	trans-crocin	T9	262, 442, 464
10.30	trans-crocin	T10	262, 440, 461 sh
10.46	cis-crocin	C2	263, 329, 440, 465 sh
10.53	trans-crocetin bis(β-d-glucosyl) ester	t-2gg	262, 327, 440, 465
10.58	cis-crocin	C3	262, 315, 442, 466
10.67	unknown	U4	239, 409, 434
10.71	unknown	U5	245, 321, 440, 465
10.77	unknown	U6	254, 301, 434, 466 sh
10.80	unknown	U7	329, 487
10.85	cis-crocetin bis(β-d-gentiobiosyl) ester	c-4GG	262, 326, 434, 458
10.92	trans-crocetin mono(β-d-gentiobiosyl) ester	t-2G	258, 435, 459
10.90	cis-crocetin (β-d-gentiobiosyl)(β-d-glucosyl) ester	c-3Gg	262, 326, 434, 460
11.09	cis-crocin	C4	258, 323, 432, 458
11.15	trans-crocetin mono(β-d-gentiobiosyl) ester	t-2G	258, 435, 459
11.23	cis-crocin	C5	320, 428, 451
11.25	unknown	U8	428, 451
11.32	trans-crocin	T11	257, 434, 458
11.36	unknown	U9	234, 402, 427
11.47	unknown	U10	264, 442, 467
11.71	trans-crocetin	t-c	258, 433, 458

^a Abbreviation in nomenclature of known crocins was adopted from ref [4].