J
Joko Ridho Witono
Researcher at Indonesian Institute of Sciences
Publications - 53
Citations - 212
Joko Ridho Witono is an academic researcher from Indonesian Institute of Sciences. The author has contributed to research in topics: Population & Biology. The author has an hindex of 5, co-authored 42 publications receiving 159 citations. Previous affiliations of Joko Ridho Witono include Center for Plant Conservation.
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Novel quinolinone alkaloids bearing a lignoid moiety and related constituents in the leaves of Melicope denhamii
Ken-ichi Nakashima,Masayoshi Oyama,Tetsuro Ito,Yukihiro Akao,Joko Ridho Witono,Dedy Darnaedi,Toshiyuki Tanaka,Jin Murata,Munekazu Iinuma +8 more
TL;DR: Hartley et al. as discussed by the authors isolated six quinolinone alkaloids bearing a phenylpropanoid or a coumarin moiety from the leaves of Melicope denhamii.
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Melicodenines A and B, novel Diels–Alder type adducts isolated from Melicope denhamii
Ken-ichi Nakashima,Masayoshi Oyama,Tetsuro Ito,Joko Ridho Witono,Dedy Darnaedi,Toshiyuki Tanaka,Jin Murata,Munekazu Iinuma +7 more
TL;DR: In this article, two Diels-Alder type adducts, melicodenines A (1) and B (2), were isolated from the leaves of Melicope denhamii (Seem).
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Pengembangan koleksi tumbuhan kebun raya daerah dalam kerangka strategi konservasi tumbuhan di indonesia
TL;DR: In this paper, Kebun Raya Indonesia (KRI) memiliki tanggung jawab untuk melaksanakan upaya konservasi tumbuhan yang ada di Indonesia.
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Novel zierane- and guaiane-type sesquiterpenes from the root of Melicope denhamii.
Ken-ichi Nakashima,Masayoshi Oyama,Tetsuro Ito,Joko Ridho Witono,Dedy Darnaedi,Toshiyuki Tanaka,Jin Murata,Munekazu Iinuma +7 more
TL;DR: Three new guaiane‐type sesquiterpenes, named melicodenones C–E (3–5), were isolated from the root of Melicope denhamii and their structures were established by extensive NMR‐spectroscopic analyses.
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A synopsis of Begonia (Begoniaceae) of Southeastern Sulawesi including four new species.
TL;DR: Material acquired on a recent expedition to Southeastern Sulawesi, Indonesia, presents an opportunity to reassess and provide an overview of the Begonia flora of the region, recognizing eleven species including four new species described and illustrated here.