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A new species of Roscoea is described and illustrated. Roscoea megalantha Tosh.Yoshida & R.Yangzom occurs in the Eastern Zone of Bhutan and neighbouring Arunachal Pradesh in India. A distribution map and an IUCN conservation assessment are given. A key to the three species of Roscoea found in Bhutan is provided. [ABSTRACT FROM AUTHOR]

Six new bisabolane-type (1-3) and santalane-type (4-6) sesquiterpenoids, together with (+)-alpha-nuciferol, (+)-citronellol, and geraniol, were isolated from the heartwood of Santalum album of Indian origin. Their structures, including two bisabolol diastereomers (1, 2), were established on the basis of spectroscopic data interpretation.

A dually HIV- and HTLV-infected ARC patient was found by serological studies in South India. These viruses were isolated and molecular study showed that the patient had both HIV-1 and HTLV-I but not HIV-2 and HTLV-II. In addition to this, 9 other dually infected persons which include another full-blown AIDS case have been identified as on July 1993 in South India. Our findings provide an opportunity to clarify geographical distribution of these human retroviruses.