Table 7 Table showing the list of compounds identified by LC–MS studies from the root crude drug samples of 14 species of family Apocynaceae

1.

Asclepias curassavica L.

1: Pekilocerin A (Kiuchi et al. 1998)

2: Uzarin (Hanna et al. 1999)

2.

Calotropis gigantea (L.) Dryand

1: Calotropone (Wang et al. 2008)

2: Calactinic acid; 3'-Et ester (Roy et al. 2005; Seeka and Sutthivaiyakit 2010)

3.

Calotropis procera (Aiton) Dryand

1: Proceraside A (Ibrahim et al. 2014)

2: Calotropagenin (Seeka and Sutthivaiyakit 2010)

4.

Carissa carandas L.

1: Carandinol (Begum et al. 2013)

5.

Carissa spinarum L.

1: Cycloolivil (wahab Sab et al. 2015)

6.

Catharanthus roseus (L.) G. Don

1: Ajmaline (Itoh et al. 2005)

2: Cadin-2-en-1β-ol-1β-D-glucuronopyranoside (Chung et al. 2007)

7.

Cryptolepis dubia (Burm.f.) M.R.Almeida

1: Cryptanoside A (Purushothaman et al. 1988)

8.

Hemidesmus indicus (L.) R. Br. ex Schult

1: Denicunine (Sigler et al. 2000)

2: Emidine (Chandra et al. 1994)

9.

Holarrhena pubescens Wall. ex G.Don

1: Holonamine (Nnadi et al. 2017)

2: Conessimine (Nnadi et al. 2017)

3: Regholarrhemine D (Bhutani et al. 1990)

10.

Ichnocarpus frutescens (L.) W.T.Aiton

1: Octyl tetracontane (Aggarwal et al. 2010)

2: 20-(2-Hydroxyphenyl) eicosyl eicosanoate (Aggarwal et al. 2010)

11.

Marsdenia tenacissima (Roxb.) Moon

1: Marsdenoside D (Deng et al. 2005)

2: Tenacissimoside B (Jiang and Luo 1996)

12.

Nerium oleander L.

1: Ocotillol (Tanaka et al. 1993)

2: Odoroside A (Isobe et al. 1986; Abe et al. 1996)

3: β-Anhydroepidigitoxigenin (Huq et al. 1999)

13.

Rauvolfia serpentina (L.) Benth ex

Kurz

1: 3-Hydroxysarpagine (Rukachaisirikul et al. 2017)

2: Sarpagine (Rukachaisirikul et al. 2017)

14.

Tabernaemontana divaricata (L.) R.Br. ex Roem. & Schult.

1: 5-Oxocoronaridine (Liu et al. 2016)

2: 19-Hydroxyconopharyngine (Zocoler et al. 2005)