▁in ▁ 1 9 6 2 ▁but ▁later ▁went ▁to ▁the ▁UK ▁to ▁purs ue ▁his ▁doctor al ▁studies . ▁He ▁secured ▁a ▁Ph d ▁in ▁ 1 9 6 5 ▁from ▁the ▁University ▁of ▁London ▁under ▁the ▁guidance ▁of ▁Sir ▁D erek ▁Bart on ▁of ▁Imperial ▁College ▁London , ▁a ▁ren owned ▁organ ic ▁chem ist ▁and ▁ 1 9 6 9 ▁Nobel ▁la ure ate ; ▁his ▁th esis ▁being ▁Studies ▁in ▁al kal oid ▁b ios yn thesis . ▁He ▁would ▁also ▁receive ▁the ▁degree ▁of ▁Doctor ▁of ▁Science ▁from ▁London ▁University ▁in ▁ 1 9 7 8 . ▁Return ing ▁to ▁India , ▁he ▁joined ▁CD RI ▁in ▁ 1 9 6 5 ▁where ▁he ▁spent ▁the ▁rest ▁of ▁his ▁official ▁career ▁till ▁his ▁super ann u ation ▁in ▁ 1 9 9 0 ▁as ▁a ▁director ▁general - grade ▁scient ist . ▁In ▁between , ▁he ▁had ▁a ▁st int ▁at ▁University ▁of ▁Con cep ción , ▁Chile ▁as ▁a ▁visit ing ▁professor . ▁Post - ret irement , ▁he ▁was ▁selected ▁as ▁an ▁emer it us ▁scient ist ▁by ▁the ▁Council ▁of ▁Scient ific ▁and ▁Indust rial ▁Research . ▁ ▁Leg acy ▁ ▁Bh ak uni , ▁during ▁the ▁course ▁of ▁his ▁active ▁research es , ▁studied ▁the ▁structure ▁and ▁s tere och em istry ▁of ▁several ▁ind igen ous ▁plants ▁and ▁synth es ized ▁them ▁for ▁finding ▁out ▁the ▁bi olog ically ▁active ▁comp ounds ; ▁his ▁work ▁on ▁the ▁bi ogen esis ▁of ▁al kal