Owarensisone: A new iridolactone from the whole plant of Brillantaisia ...

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SUPPLEMENTARY MATERIAL

Owarensisone: A new iridolactone from the whole plant of Brillantaisia owarensis P. Beauv Perrin Lanversin FONING TEBOUa, Florence Déclaire MABOUa, David NGNOKAMa*, Dominique HARAKATb and Laurence VOUTQUENNE-NAZABADIOKOc a

Faculty of Science, Department of Chemistry, University of Dschang, P.O. Box 67. Dschang

Cameroon b

Service Commun d’Analyses, Institut de Chimie Moléculaire de Reims (ICMR), CNRS

UMR 7312, Bat. 18 B.P. 1039, 51687 Reims Cedex 2, France c

Groupe Isolement et Structure, Institut de Chimie Moléculaire de Reims (ICMR), CNRS

UMR 7312, Bat. 18 B.P. 1039, 51687 Reims Cedex 2, France *

Corresponding author. E-mail. [email protected]

Perrin Lanversin Foning Tebou. E-mail: [email protected] Florence Déclaire MABOU. E-mail: [email protected] David NGNOKAM. E-mail: [email protected] Dominique HARAKAT. E-mail: [email protected] Laurence VOUTQUENNE-NAZABADIOKO. E-mail: [email protected]

Abstract: From the whole plant of Brillantaisia owariensis P. Beauv, a new iridolactone, owariensisone (1) together with six known compounds (nepetin-7-O-glucoside, choline, sucrose,

mannitol,

xylitol,

1-O-palmitoyl-2-eicosanoyl-3-O-(6-amino-6-deoxy)-β-D-

glucopyranosyl-glycerol) were isolated. Structures of these compounds were established by direct interpretation of their spectral data, mainly HR-TOFESIMS, 1D-NMR (1H and 13C) and 2D-NMR (1H-1H COSY, HSQC, HMBC, NOESY, TOCSY and DOCSY) and by comparison with the literature.

Keywords: Brillantaisia owarensis; Acanthaceae; Owarensisone; Structure elucidation.

Table S1 1

H (600 MHz) and

13

C (150 MHz) NMR data, and COSY and HMBC correlations of

compound 1, in CD3OD. Position δC

δH (mult, J in Hz)

COSY

HMBC (H

1

4.24 (1H, dd, 11.8, 6.6, H-a)

9

3, 5, 8, 9

68.6

4.58 (1H, dd, 11.8, 4.8, H-b) 3

174.6

4

44.5

2.79 (1H, d, 14.5, H-a)

3, 5, 6, 9

2.82 (1H, d, 14.5, H-b) 5

80.0

6

48.0

7, 10 (4J)

7, 8, 5

5.68 (1H, brqt, 1.8)

6, 10

5, 6, 9, 10

2.59 (1H, dt, 17.8, 1.8, H-a) 2.64 (1H, dm, 17.8, H-b)

7

126.9

8

141.7

9

55.1

3.02 (1H, brt, 5.3)

1

1, 5, 7, 8

10

60.5

4.12 (2H, brs)

7, 6 (4J)

7, 8

Figure S 1 : Mass spectrum of compound 1

C)

Figure S 2 : NOESY spectrum of compound 1

Figure S 3 : HSQC spectrum of compound 1

Figure S 4 : HMBC spectrum of compound 1

Figure S 5 : 1H-1H COSY spectrum of compound

Figure S 6 : 13C-NMR spectrum of compound 1

Figure S 7 : 1H-NMR spectrum of compound 1