New triglycerides from antimicrobial extracts of <i>Nepeta hindostana</i> weed

Abstract

Three new triglycerides (<b>21, 22 </b>and<b> 23</b>) along with several known fatty compounds: palmitic acid (<b>1</b>), oleic acid (<b>2</b>), linoleic acid (<b>3</b>), palmitic acid methyl ester (<b>4</b>), oleic acid methyl ester (<b>5</b>), alkane: tetracosane (<b>6</b>), alkenes: docos-1-ene (<b>7</b>), 1,3,3-trimethyl-cyclo-prop-1-ene (<b>8</b>), triglycerides: glycerol-1,2,3-triolein (<b>14</b>), glycerol-1,2,3-tripalmitin (<b>10</b>), glycerol-1,3-dipalmitate-2-oleate (<b>11</b>), glycerol-2,3-dioleo-1-palmitate (<b>12</b>), glycerol-1,2-dipalmito-3-oleate (<b>13</b>), steroids: lupeone (<b>15</b>), stigmasterol (<b>16</b>), β-sitosterol (<b>17</b>), monoterpenoid: linalool (<b>9</b>), triterpenoids: oleanonic acid (<b>18</b>), oleanolic acid (<b>19</b>), and ursolic acid (<b>20</b>) have been isolated from the hexane, ethyl acetate and methanol extracts of the aerial part of <i>N. hindostana.</i> Their structures have been elucidated on the basis of spectroscopic techniques including 1D, 2D NMR and MS. The hexane, ethyl acetate and methanol extracts have shown good antimicrobial activity.